I had it with my last cycle - and just like everything else we're all experiencing, it means that either you're pregnant or that you just have heartburn. Gahhhhhhhhh, so frustrating.
I've noticed that too, but then since I was eating spaghetti I chalked it up to being too much garlic. Although I never experienced before....I try not to read into anything anymore.
Re: heartburn
I had it a lot last cycle. I was sure that it was a sign, but I ended up with a BFN. For me, I think it was the stress of my 1st 2WW.
Good luck!
DS#1- Born August 2011