Has anyone been pregnant and got negative tests?

So I’ve taken a few tests that had very very faint lines to the point that I’m beginning to think they were just indents. I’m at cycle day 51 with bad headaches, dizziness, cramping, very moody and my nipples hurt. This has been going on for a couple of weeks rather than the week before my period. The way doctor appointment work here is a big process that I’d rather avoid if it’s literally just a super late period.. so my question is, has this happened to anyone personally and ended up being pregnant after all? I’m convinced but at the same time my tests are negative😭

Any advice is greatly appreciated💜