So freaking confused!

Okay. So I had all my period symptoms like two weeks prior to getting my period & throughout the cycle. Then I was 4 days late. Then had sex and the period came. That was on June 10th. That day it was a very light pinkish blood amount yet was VERY light for that day. Then the following two days I was heavy even blood clots. Then Day 4 on my period I was light again with some brownish spots and then yesterday I spotted brownish discharge again small amounts. Today I haven’t had any discharge but cramps and back pains so bad I have to lay down. The twins (my boobs) are sometimes sensitive & sore to touch! Like WTF is happening!? I didn’t suffer enough two weeks before my late ass period... Then my bestfriend tells me that she has a cousin doctor that says some women sometimes do have a period and can still be pregnant! That’s like the opposite of what my doctor says!! What the heck?? I’m 29 years old and if I were pregnant this would be my first ever pregnancy. My periods are irregular and I’m like a size 16 in jeans. & I do have high stress levels in my life. Knowing all this. Is it possible to be pregnant & still have a period! I’m hearing way to many different things! & it’s confusing me! I’ll test soon just to be sure but just wanted so advice & opinions!