hey guys ! :)

I've been really worried this past month. around April 3rd my partner and i had unprotected sex 3 days in a row so i took the morning after pills for 2 days in a row. A week later i got my period (which was a bit early) and it was red fresh blood and laster about 5-6 days. After this, a month and a half goes by and i get my period again (MAY) but this time is is brown from the start to the end of the cycle (about 5-6 days) and is very very light, i didn't think too much of this because i have had brown discharge when i was 13 from a hormonal imbalance and i have been put on hormonal medication but refused to take them as i saw my cycle was improving over the years. Now i have not gotten my periods since May and it is July, 3 days ago a got about 3 drops off brown discharge again and i thought this would be my period starting but that was it and today i got a few drops again of brown discharge. I was worried i might be pregnant but i had sex 3 months ago and ever get the early symptoms , i took 3 pregnancy tests and they all testes negative. Can anyone help me??