Am I pregnant (long sorry please help)

I had sex July 19 unprotected and he pulled out but I don’t know if it was in time so since then I have a felt a lot of different things about my body (also I got off birth control june 23) after a couple of days after we had sex I started getting weird symptoms that I haven’t had (forgot to say my period was due July 28) I felt nauseous and extremely tired even after sleeping for hrs . Then a couple days more I started getting headaches and really sore boobs . Then I ended up getting what I thought was my period but it only lasted 2 days pretty light and for me that’s not normal I normally bleed very heavy . So after that some symptoms went away besides head aches and being tired now it is august 11 and I have sore boobs and nausea again as well as head aches and my uterus feels kind of heavy idk if that makes sense i took two test but both came out negative but I took them a week after I had sex and then a a day after my (period or not period I have no idea) so I looked it up and apparently it was to early so I took one again on the eighth and it was negative but something just doesn’t feel right I am 17 so can someone please help me I also forgot to mention that apparently the internet says 3 weeks is still pretty early to get a positive . And another thing was that I let a test sit for like 7 minutes and a very faint like showed up but I know that’s out of the time frame but it left me very confused someone please help me