During&after sex i get sharp pains in lower stomach& rectum area. i think it's gas. happens a lot now during & after sex now. could this b a problem?

Find reason: Imo one reason for females to have abdominal, pelvic & rectal pain with sex is chronic laxity of sacroiliac joints arousing presacral nerve stimulation. Joint hypermobility syndrome and/or mechanical pelvic injury (oft multiple births) can cause joint laxity; as can hormone relaxin released during menses. Missionary position can arouse pain from pelvic torsion. Spooning might be more comfortable.