So frustrated need to get to a doctor asap

,I took a test on Wednesday afternoon and it was positive with the faintest line! I wasn't expecting it at all cause my period only ended on the 5th of June. me and my partner had unprotected sex near enough every day during that month but I honestly didn't think anything would happen. I've taken 2 first response tests and 2 cheapies and each test the line has gotten stronger. I was just thinking earlier that my last period I thought I had a misscarrige (not for definite cause I hadn't been to the doctor or anything just passed a clot) it was a heavy period then just light spotting. I was thinking that's why a test is showing up positive but surely if that was the case the lines wouldn't be getting darker on a test?