Am I pregnant? Advice

Well my period is 2 weeks late this evening and I’ve taken 3 tests and they are all negative. The last one I took was about 5 days ago. I’m really starting to panic even tho they’ve been negative. We don’t normally use protection but he always pulls out in advance. I know that isn’t a safe idea but we don’t have condoms on hand often. I haven’t been puking or having cramps or anything like that. But I don’t think it’s late because of stress because I don’t get stressed? What could be happening?