Hello, I've Felt Nauseous For 5weeka Now, I Have A

Hello, I've felt nauseous for 5weeka now, I have a long term relationship and recently recovered from anorexia 7months ago. I also have a lot of symptoms many say are pregnancy but I am on the pill. I went to the drs two weeks in the test was negative but apparently it could've been too early ? And that anorexia could've interfered with receiving a correct reading as my hormones are all over ?