Hey ladies

I’m on the pill (combo pill!) I take it religiously well Monday I had sex and he pulled out like usual he came in a towel and cleaned himself off then went back in for a second round never came again though! Well we have done this plenty of times before and I’ve never been worried but about 4 days after the sex I noticed I had a little spotting but I’m supposed to get my period this coming week should I be worried?!