I think the only answer is you don't know until you try. It's easy to say sex is perfectly safe in pregnancy, but it's more complicated than that, it's hit and miss.
DH and I had a very active sex life from the very beginning. Then, in my 12th week, in the middle of night before the scan, I started bleeding like crazy (warning: TMI). Fresh, bright red blood everywhere, it looked like a proper period. We freaked out of course, it was an absolute shock after 12 weeks without a single drop of blood or even discharge. The scan showed the baby is perfectly fine, but half of my placenta was covered in black shadows - the haematoma that was the source of bleeding.
The bleeding happened three times during week 12 and made me feel awful, afraid, guilty and anxious about my every step. I know what triggered it and doctor and midwife agree - an orgasm. The contractions that happen during orgasm (and for some women during penetration without orgasm) can lead to bleeding. I've been ordered strict rest and no sex for a few weeks. I also got more frequent scans because they want to monitor me. I'm in week 13 at the moment and I'm still barely able to calm down. I'm not sure I'll be mentally able to have sex again during this pregnancy, even if I get a free light from the doctor. Luckily, I have the gentlest, kindest, most supportive other half.
You just don't know if it will happen to you until it happens. It can happen to absolutely anyone, no matter how textbook perfect your pregnancy looked like up to that point and how frequently you have had sex. Bleeding is not as rare as many think, it's just not something that's usually discussed before it happens. So it's up to you whether you want to try having sex. In any case, you should talk about intimacy and your concerns with your partner so that neither side is feeling anxious about anything. Communication and openness are the key. We all have natural needs for intimacy, but we also have legit worries that should be talked about.