Need a little bit of advice Please

Hello Ladies. I am just looking for some advice and input. I am a young woman, aged 19 and i recently decided to change contraceptive method. I was off my pill for around 1-2 months but was using condoms with my boyfriend. Unfortunately one night during my ovulation week the condom broke and we didn't realize until it was "too late". I am a healthy woman but have been feeling very run down and poorly. I have felt sick a lot and worried me as it's not like me! i have cramps a lot of the time also. I am always tired and very moody and tend to take it out on my boyfriend but end up crying two minutes later because i feel terrible. My period is two days late roughly. I have had a lot of discharge. I had taken a test 5 days before my period was due and it came back negative. Any advice?