Finally some answers after no period for 3 months

Last February on the 25th my period was late so I decided to take a test. It ended up being Negative so I just thought it was late. I then started bleeding on the 28th but it wasn't like my normal periods. it was light pink and really light and was spotty for a few days then it turned brown. I just guessed it was from me taking out kyleena. then April 3rd comes around which is when my period normally would have been cuz I have a 35 day cycle, I wasn't bleeding. I went to Walmart and got a few dollar tests and took one that day. I was still showing up negative so I waited until it was 10 days PAF and took another. I was still negative so I waited again and by now I'm 12 days PAF and called my OBGYN office and made an appointment because I thought, by now I gotta be pregnant. I go in and get bloodwork done and pee test there and try to tell the nurse I haven't had a normal period since January and explain my bleeding sounded like implantation bleeding but she wouldn't listen so I did the test and got called back saying my bloodwork is negative too. I think okay that's weird. Then it is now 20ish days PAF and I'm starting to get worries. I call Planned Parenthood just cuz they take such short notice appointments and took a test there after the hospital denied me service and turned up positive!!! I had them fax it over to my OB and now they're admitting me to prenatal care finally