Gaining too much too fast?

Hi mamas, I am a FTM and my pre pregnancy weight was 118, I’m 21 weeks and am at 145 now. I feel huge and have people asking me all the time if I’m sure there’s just 1, which honestly gets annoying. I don’t know if I’m eating too much or what but my belly is huge. I know everyone’s bodies are different but based on my pre-pregnancy body to now do you think I am gaining too much too quickly or is this normal?

P.S. I haven’t seen my doctor in over 10 weeks since my NT ultrasound and baby was measuring a week ahe