Talk to Gynecologist on Gynecological

I had unprotected intercourse a couple of times and it was a pull out method. One of the intercourses was during the ovulation time which was a week. I took an ecp within two days after the unprotected sex. So what is happening right now, is that I've been feeling a bit weird. I don't know how to explain it either and there's a lot of fatigue as well. There was a bit of spotting today which started around 3pm. I wasn't supposed to have periods till another 7 days and I usually have periods on time since the last one year or so. I was reading about implantation bleeding. Could this be it? There isn't a consistent blood flow right now either, it's brownish. Doesn't look anything like what it does during the first few days of periods. Doesn't feel like it either. Very subtle cramps especially the fact that my hip bone hurts too during periods and it isn't the case here. Kindly guide me a little.