Addicted to throwing up while pregnant

Currently 13w3d. My last few pregnancies, I had terrible gag reflexes when brushing my teeth. Every time I would brush my teeth (or see my husband brush his) it would make me ill and start gagging profusely. This pregnancy is far worse than the previous ones, as I actually almost always end up vomiting whereas b4 I'd only gag a lot. Now I'm vomiting and I feel so ill like I can barely stand. It's like a pain in my stomach from throwing up. Anyway, the problem is, I've now become almost addicted to doing this? Like I look forward to when it's time for me to brush, i know its time for me to throw up. It's so strange, I've never had this issue before, I've never had an eating disorder, tho this pregnancy has been terrible for eating. I can't eat anything except fruit. My previous pregnancies I would do everything to brush as carefully as possible to avoid the gagging issue but not now. Has this ever happened to anyone? I'm embarrassed to talk to my dr about it.