Tmi photo. Please help?

Kayla • 20 with the most perfect family. Blessed with one handsome husband and one perfect little chunky 9month old baby girl.
I'm 24 weeks 2 days! This started a few weeks ago, I was 20weeks. I thought it was because my bras were too small. Because of the fact it was a little red under my boobs. So I went and got new bras. I was in a 38DD before I got pregnant. Anyways I went to motherhood and got fitted for new bras 38F. I went with the most comfortable bras which happened to be expensive, soft and no wires. I immediately brought them home and washed them(same laundry detergent as always gain, I'm allergic to the other kinds). Been wearing them for a week now... Well this has gotten so much worse and it's starting to go down my belly. Has anyone ever seen or experienced this before?