sex is anyone still having sex missionary?? and do u feel safe

Liza • 31 married 3 yearsl been with SO for 15 years
Sounds like a dumb question but I'm showing just a little ... 
Missionary is my husbands favorite currently 16 weeks 3 days ..doin some research it says it's ok until u feel uncomfortable. I just feel weird maybe it's in my head... bc I kno it's a baby in my uterus now. Of course it doesn't bother him. Lol