Nausea from heat? Uncomfortable pelvic pain?

Shasta
I am 14 weeks, and I noticed that I seem to get nauseous and puke anytime I am hot, slightly too warm, or even if I am taking a shower. Anybody else get this? Also, I keep getting this incomfortable tight, spasming, maybe pressure feeling in my bum, and my vagina. Sorry to be detailed but I'm worried. Anybody else get this?