Need an opinion

I did the deed the night before day 1 of ovulation. And maybe 3 days before that with no protection... the next morning i felt the usual ovulation cramps. I did take plan b 2 and a half days later. Even though i read that it doesnt work while ovulating 🤦‍♀️through out ovulation ive had very sore breasts and slight cramping. Then my boobs hurt so bad, feeling heavy, nipples hurt etc. Ive been bloated. I have severe mood swings. Made my man mad. The cramps never went away either. Im 15 days dpo supposed to start my period today but 4 days ago i wiped and had light brown blood? Been getting this light brown blood and one time it was pink. Then it had tiny brown streaks in it? No real blood. It stopped yesterday. Im still cramping but they dont feel like period cramps. They are light. But im supposed to start my period today? And im not bleeding just small amount of light brown blood. The tissue is tan. Im so confused. I dont have a pregnancy test right now. But would it be to soon to take one? Someone please give me your opinion. Has this happened to anyone else? And you became pregnant??