This is such a long story... I'll try to abbreviate it somewhat.
Thursday night we noticed a couple of red marks on Cal that I immediately chalked up to the straps of his carseat pinching him. But then we noticed another one on his belly, and one someplace else. Next morning there was a really dark red one on his belly and it was a thick line, not a dot. I happen to know that the one rash to really worry about is the kind that does not pass the "does it blanch with pressure" test. This did not. However, there seemed to be reasonable explanations for most of the marks (i.e. when DH's dad saw the dark red line on Cal's belly, he told us that when he had picked Cal up earlier his glasses in his pocket jabbed Cal in the belly.)
But Saturday morning there were a bunch of new marks and they looked like bad scratches. Yet, nothing had scratched him. It was clearly bleeding under the skin - no broken or raised skin, whatsoever. Not a typical bruise, though...didn't turn black & blue. Instead, the older ones faded to a light red. He also had a mass of them under his arms.
I knew this was petechiae (b/c he had had a rash last year that I'd looked up and that's how I learned about it), and I knew petechiae usually aren't good news. Yet, otherwise, he was perfectly healthy (aside from getting over a cold), and behaving normally. Lots of energy, eating well, etc.
Called his pedi on our way home yesterday and he said that since they didn't blanch w/ pressure he thought someone should take a look (but wasn't too concerned since Cal seemed to be perfectly healthy). Their office is open for a few hours Sunday so he asked us to come in this morning. We saw a NP and she agreed that he checked out/seemed perfectly healthy, but thought we should get a blood test to check his platelets. Bleeding under the skin can indicate infection - worst case scenario: Leukemia. She did not say this - I learned this from Dr. Google. She actually said she expected the results to be normal b/c he was so healthy otherwise.
We had to wait 3 hours after the blood draw to get the results and those were the longest 3 hours of my life. I have never been as scared and nervous as I have in the last 24 hours.
The results were all normal, except for one test: his PTT (prothrombin time) was slightly elevated. This tests how long it takes your blood to clot. She consulted a hematologist and he said that 9/10 kids they see with petechiae have a viral cause. He wasn't concerned, but suggested a retest in 2 weeks to see how the PTT looks. If it's high, it could indicate a clotting disorder. But the other stuff we were worried about is no longer on the radar. Whew.
So, that was a relief but I won't feel completely at ease until the marks stop showing up. We noticed new ones tonight. It doesn't help that when I look at pics of petechiae online they don't look like what he has. Everything I see shows tiny red or purple dots, usually all massed together. He has them spread out and they are light orange to bright/dark red in color, and many of them look like scratches or scrapes. The newest one is under his chin and looks like a big scrape. Oh, I should also have said that most of them, but not all, seem to be where there are been pressure or irritation - like from the carseat strap, or his diaper or the button on his pants.
If any of you have ever experienced this, I'd love to hear about it. Also, if you have, or know about, clotting disorders, I'd be interested to hear about those, although I know I am jumping the gun. The one she mentioned begins with "V" - can't remember the name.
Hopefully it's viral and this will all be over soon. I think I lost a few years of my life after this experience. I also lost a number of pounds, so I suppose that is the silver lining.
Thanks for taking the time to read this!
ETA; Forgot to mention that he had an injury Friday that didn't heal in a typical way, which makes me wonder if it's related to the elevated PTT. He bonked his head hard on the frame of a recliner. It started out swelling and bruising, and there were 2 small places where the skin was broken. But that night the entire area was a scrape. It never bled but over the last 2 days turned bright red and scabbed over. So weird. I was expecting it to turn into a bump/bruise like his previous head bonks.