Ok I need some advice

Dec 28-period started

Jan 28- period started

Haven't had one since. My periods have always been a little off, but this seems excessive

I've taken 2 tests in the past week and they both were negative

But I've been feeling weird. I'm tired (but I'm a teacher so that's pretty much all of the time) and I've been nauseous too, but I'm worried that's just in my head because I want this so badly. My fingers are swollen too. (Is that a symptom?)

Should I go buy a digital test? Call my doc? What should I do?