I need some advice

Brooklyn
Alright. I'm 10 days late. I took two test the day I was supposed to start and another 2 days after I was supposed to start. All were negative. I've had a few symptoms of being pregnant but when I bought more tests, they weren't working (no line appeared in the control window). I made an appointment with a doctor but the soonest they could get me in was the 13th. I can't wait that long. I want to know soon if I am pregnant so I can start being healthier for the life I might be growing. Is there any way I can check without wasting more money on tests that clearly don't work? Could I go to a walk in clinic and get tested? I just can't wait more than two weeks to find out.