Might be pregnant?

Well, I am very irregular but I was fertile 3 weeks ago supposedly and me and my boyfriend had sex multiple times Super Bowl weekend. (feb 3-4) well, last Thursday evening I had light light blood everytime I wiped, and also Friday morning...it just started this morning (Monday) and it was like a light brown-ish color. I’ve had some headaches this weekend as well and not wanting to eat much this weekend. Thoughts?