Should this brown blood be of concern?

[Jumpjune]

I got my regular period in July that ended on like the 23rd. On the 24th, I had unprotected sex and he came a little bit inside of me and the rest got on his stomach. I got an emergency contraception pill the same day and took it that night. I got a normal period AGAIN like three or two days later that lasted like two-four days and went away with no problems. Then, the next week around the 31st, I had sex again but he didn't come inside me. Everything was fine until Monday the 7th this week. I began to bleed what appears to be like brown blood. It's not light, and it's been going for four days now. There's no smell to it, and it's just a dark brown kind of period. I'm not supposed to have my actual period until like the 20th of August, so what is this?? Is this normal? Could it be implantation bleeding? Could it just be a side effect from the pill I took two weeks ago? Thank you for any help

[Swelter_]

It could be a side-effect from the pill, but even if you're using the withdrawal method without using any protection, there is always a small chance of pregnancy, so be careful. Visit a gynecologist if you can, because this is mid cycle bleeding (which COULD happen due to a variety of non-pregnancy reasons as well).