Had sex, and about 6-8 days later, got my period. Still feel every sign of pregnancy which is weird.

Hi, Me and my boyfriend had sex on the 6th of this month (July). We had normal sex, just without a condom or birth control. About a week after sex, (a week before my period), I started getting sore and tender breasts, but only to the touch. My stomach was very bloated, and I am very very tired, but then I can't sleep at night. When  I finally get to sleep, I sleep very late into the afternoon, when usually I'm up around 9-10 o'clock. About a week of feeling all of this, I got my period. My period was not normal this time. It was not as heavy as my other periods, but kind of heavy. So in other words, I wasn't spotting, but it didn't seem normal. I never get sore breasts before my period, or dizziness, never break out, and never feel slightly sick, but lately I have. I know it's not early enough to be having these symptoms, but it is possible, if you read other articles. Also, I've read that the period you get about one week after sex could be the "implantation bleeding". But implantation bleeding is usually a light pink or brown color. Mine was just a dark red like usuall and only went on for about three days. I'm not trying to blabber on, I just want to name exactly everything going on before hand, so i get accurate helpers. I will get a pregnancy test, but I've read that you have to wait another month just incase you get another period (meaning it wasn't implantation bleeding). I would love to hear the answer to this question. I want to know if I am pregnant, or if it's just in my head. Oh btw, now that my period is over, i feel bloated when i'm laying flat on my back and let out all of my air. Didn't know what that was either. Well anyways, you can throw hate comments in here for fun but i just want to read accurate answers by other mom's, or people feeling the same as me. Thank you very much for reading all of this nonsense, lol i hope i'm helping some girls not feel the same way.