Am I being unreasonable?

I’m a ftm 10 weeks pregnant, going through all the nausea, puking, headaches stage. I started showing a bit of a bump, also been feeling bloated overall not great. I totally understand that this is normal but at the same time it’s putting my self esteem down a bit. What makes it worse is that I found out my boyfriend recently opened a new Instagram account and following a bunch of those “onlyfans girls”. I know he’s not talking to anyone on there and that he doesn’t have an onlyfans because I checked his phone when he was sleeping and logged into the account through my phone. I tried talking to him and telling him that it made me uncomfortable that he had a whole other account for that and that he didn’t tell me about it, I told him I would prefer if he didn’t use that account and he said he could do whatever he wanted that it’s his problem and not mine and that really hurt my feelings. I told him and he just blew me off. I feel like even though I’ve been feeling different because of pregnancy I try to look put together and he just keeps blowing me off. I feel like your partner should be there for you during these hard times and I don’t feel like he’s being there for me at all. Am I overreacting about this? Is it me just being overly sensitive?