Can anyone else relate?

My husband and I have had a very healthy sex life during this pregnancy I am 35 weeks today and even tho some positions make it more uncomfortable I still enjoy making love. However the last few days when we are doing the deed if I have a orgasm I will get a mildly sharp crampy type of pain. I'm a first time mom so I'm not quite sure what this means? Little man is still as active as ever and it never last longer than a few seconds. Are they normal? Is this what Braxton hicks contractions are like? Should we slow down or hold off on sex until after he arrives? We currently have sex anywhere from 2-5 times daily 😳😉 any advice or info is appreciated