Need to know what you think, pregnant?

Had 2 weeks ago on my pill free week.. am on the pill and we used a condom and pulled out before he d.. Me and the guy i'd been seeing have gone our seperate ways and now im stressing that could be pregnant. I've put on a bit of weight as of late and my have got bigger.. anyways I noticed blue veins on my today and have bn urinating more than usual. I've put this down to stress as just home from hospital after getting a procedure done and usually when stressed go to the loo more.. Ive taken a test and it was negative.. I'm so scared and feel so alone..