I tried making a Reddit account and it asked me to build karma before I could ask on any of the relevant subs so I'm posting here.
I can personally say that if anything goes up there, it hurts, and not in a good way. It does not feel pleasurable at all. It feels kind of like placing a finger on an open sore and pushing down.
Also, if you're being examined, they tell you to take deep breaths, as if they know that anything going up is going to be painful. If sex is supposed to be pleasurable and enjoyable, why would doctors tell you to brace for impact, so to speak?
Lastly, women often scream during sex. It's often said they're screaming out of pleasure and not pain. But there are a lot of things I find extremely pleasurable, but I don't scream while I do them.
Is it just one of those things that is painful but we're conditioned into believing the pain is actually pleasure and I must have inconsistent pain tolerance and I am making a big deal out of this?
I am appalled that no one has brought this up so far- but it hurts because they are touching the cervix, which generally doesn't get touched, and can be very painful to hit. The speculum they are inserting is designed to slightly open the cervix for the examination.
OP, there are many sizes of vagina. You may have one that's on the smaller side, with a low pelvic floor. My partner is the same way, and penetration can be painful for them. We have switched to using very small toys or focusing on clitoral stimulation to get them off instead of relying on penetration.
If your doctor clears you, you may just have a low pelvic floor, and may not like penetrative sex. Which is fine! It's just good to know about yourself.