Do you think I can be Prego?

TBaby
I'm 22 days late. My cycle is always 27-29 max days. I started spotting two weeks before my period was due and then would spot for a couple days then a couple maker days would be fine then i would spot again. I've taken test and all can back negative. I want to make a doctors appointment, but my doctor is currently on vacation for another week. What should I do?