Okay so here's what happened.

My boyfriend and I have always had safe sex (with condoms, I'm not on the pill for health reasons). I had to take the morning after pill on 5th November after there was some backward leakage. We didn't want to risk it. I got a very light period after that. Lasted only 3 days. The period after that was light as well. I chucked it to side effects of the pill.

Recently we had sex during my ovulation. He wore condom so we didn't worry. But now I'm putting on weight rapidly. I don't fit in a dress I wore last Monday. I have bought a pregnancy test but apparently it's recommended that I take after I miss my period. Shall I wait that long? I'm worried. Please help?