Symptoms come and go. Its normal. I am 11 weeks tomorrow and just about every symptom is gone. If you lurk around the boards a bit, you will see this is pretty normal and might ease some fears!
My boobs haven't been sore in weeks, probably since that same time. Most symptoms don't last. It's not a sign of anything other than your body adapting to pregnancy.
I'm going through the same thing. I'm 8w1d and my symptoms starting disappearing about 11 days ago. Went in for the first US 5 days ago and baby was fine, HB was 171. Who knows. I am still worried that I feel good and hoping I'm just lucky?:/
Mine don't hurt at all anymore and, when they did (up until 10 weeks or so), they often didn't hurt for a couple of days. I also noticed they would hurt more with specific bras which were adjusted a bit tighter. Don't worry about it as it's not a reliable measure either way of what's going on. And, as others have mentioned, symptoms start to go away as time goes on.
Re: Boobs stopped hurting at 8 wks 5 days