My Last Period Was On September 28th . I Has

my last period was on september 28th . I has sexual contact on the 1st of of last month but it was just him trying to get inside my vagina. He never got in.
I been stress out about it because we don't know if any semen came out.
I should had started my period this week but i haven't. I only have a yellowish discharge coming out of my vagina. I had taken three pegnacy test (oct 28,oct 30,nov 2) and all came out negative. The discharge has been going on for like three days and it just got a little smelly. It wasn't a bad smell before yet its getting a little bit unplesant now