My boyfriend and I have had manual sex where pre cum may or may not have been present (neither of us are sure.) Since the most risky encounter like 2 months ago I have had a period, but this month it's later than it ever has been. I've been feeling weird, as in stomach issues and generally feeling sick. I'm concerned not only because of the pregnancy fear, but because if I'm not pregnant all of this could be indicative of something equally serious going on.
For clarification, my boyfriend never came, so there has never been semen present- just precum. I'm worried and confused, any advice or input is appreciated.