Am I pregnant/ Is this Normal?

Hi girls, I have no friends where I live so I'm hoping one of you might have the answer or recognize my symptoms. I have had unprotected sex about 4 times in the last 2 months. all during low pregnancy chance days (3%). I noticed these past months that my period is abnormal. Not the full 7 day heavy flow i usually get. i spot here and there, and have sharp pains in my abdomen during sex. I've been getting sharp pains on both sides near my ovaries, but never both sides at the same time. Any thoughts? Should I take a test?

P.S. I would have taken a test by now, butbut I'm really short on money so I've been waiting.