please help??

Kelly 💙👼🏽💖🌈🌈
So I'm 32 days late,  been having brown spotting every day since last Thursday. Been to see my doctor and she wasn't very helpful, had blood tests to look for pregnancy and they was clear.. I just don't understand I'm 32 days late Iv done so many pregnancy tests (all different brands - from strips to digital) and all negative.. I'm currently taking folic acid, been ttc since January.. my periods are normally regular, this is the first time it's ever happened.. what do I do? I'm under a fertility clinic but not due to see them yet I don't think until my partners sperm analysis comes back (he had a vasectomy reversal a year ago) and I'm awaiting for my keyhole op larascopy.. anyone else been through this?