I hv had a surgery after my first intercourse. Its been a long time i never had it again. Can u please share ur post surgery expierence
If you'd had two children vaginally this would be extremely unusual (and it is certainly unusual enough), but it's hard to see why having had children by c-section would make any difference. (If a vagina had stretched to accommodate a child's head without tearing it should be able to handle a man's penis, but yours never had to go to that extreme.)
I assume, though, that all the times you have had sex before, you've never had such a problem. This would suggest either something has changed about your vagina, or something is different about your boyfriend's penis or possibly his technique. If you were to measure, would his penis come out as unusually big around? Was he doing something really active or rough? Were you lubricated? Has the amount of natural lubrication you feel during sex changed over time? Has your doctor ever talked to you about vaginal tissues thinning over the years or anything like that? (You don't mention your age, but this can happen towards perimenopause.)
Talk to your doc and see if he or she can suggest anything. I'd go slow and use lots of lube.