Confused

melo
My last actual 5 day period started on February 15th , I've been having unprotected sex with my boyfriend we've had a couple slip ups. I was due for my period on march 16th or around that time but instead on march 11th & 12th I spotted brown/pinkish blood (Tmi sorry) It wasn't heavy at all , couldn't even fill up a tampon at all. I tested and got a negative, Its currently April 11th and I still havent got my period 🤦🏻‍♀️ Could I be pregnant or is my body just playing games? FYI I've never had a 2 day period until march 🤷🏻‍♀️