Second pregnancy

This might not make since cuz I’m up set and idk how to put it. But I was pregnant with my son in the summer I was 7,8,9 months during the summer of 2015, and now I’m pregnant again with my second and just now pregnant 3 months and this heat and everything had got me rly hot and feeling bad, well my boyfriend keeps telling me that I didn’t do this with my first so why am I being this way with this one, (and if any of you live in Texas you know how hot it can get) he don’t understand that it’s diff with all pregnancy and not the same I feel like I’m all alone now in this cuz he gets mad at me for be meh bout the heat am I wrong for feelin like this and being to hot? Like I feel like I’m the fuck up cuz I’m meh frm it being so hot, pls help me out not all pregnancy are the same so why is it that I’m like this now and wasn’t with my son, sorry if you don’t understand, like I say before I’m rly upset bout it. Pls help me