Two negative tests, still no period?

Ok so i’m about 5 days late, took a test yesterday that came out negative and one this morning that came out negative too, but I’m still so scared and idk why?! My nipples have been sore for about a week and a half now which they never are sore that long before i start, but everyone keeps saying I need to try and relax because i took two tests and got negatives but i just feel so extra paranoid? Everyone around me is getting pregnant lately so maybe that’s why I’m so stuck on it? Idk honestly but I’m still not relaxed about it because i haven’t gotten a period yet.