For me, I was put on no sex/orgasms for my pregnancy as I had a bleed at 10 weeks and a scan revealed a large pocket of blood just above the uterus. Doing anything that risked dislodging that pocket of blood put me at high risk of miscarrying.
I tell you this not to worry you, but to make all the people making you feel crazy, over-anxious or stupid for worrying about orgasms in pregnancy, aware that it's a common question and cause of anxiety in pregnancy.
As it was, my little boy is 18 months and asleep in my arms right now 🙂
What I had, I believe, isn't super common, thankfully. But after miscarriages and IVF I was totally anxious and worried about anything and everything so I totally understand how you feel.
Keep talking to your midwife, friends and family (and the helpful people on here) but don't bottle things up or let it stress you too much!
Generally, unless you've been told not too by a medical professional, then sex/orgasms are completely safe 🙂
Also, huge congratulations 🥳