Help?

Me and my boyfriend had unprotected sex a few times then with a condom about a month ago, he didn’t ejactulate. I’m now on the pill and sexually active, my period hasn’t come and is about 2 weeks late. I’m new to the pill so I’m aware you should only bleed in a specific period of time, I took a pregnancy test that came back as negative. I’m planning on taking another one just too make sure though. I’m very bloated and also have a very stressful life at this moment in time, so I know both could contribute to it being late, but is it possible that it’s just my pill working? Ples help