am i pregnant or is it just a yeast infection or nothing?

So i have been having sex once, every 2 weekends, since May 3rd. We use a condom every time. Before May 3rd I have never had sex. But ever since, there has been a small amount of white, gooey, kinda smelly stuff in my panties every other day. My stomach only hurt about 3 times within May 3rd. My last period was May 5th and I haven’t gotten the next one. Am I pregnant, is it a yeast infection or just hormones since I’m all of a sudden having sex ?