4 months ago, I had sex and that ended in my partner nutting in me more than once, so I was concerned because 2 weeks later I got some light-med. slimy bleeding that was shorter than my regular period. I've never had irregular cycles so I decided to take a hpt & it was negative. In feb. after everything happened I didn't get my period so I took another hpt and it was negative also. Every test i've taken has been a BFN. Now i've been getting something like my period twice a month. I'm also getting some weird symptoms such as nausea in the morning, tiredness, weight gain, back aches, hunger, super dry skin... I just don't know what to think or what to do please help!