61 days late for period and negative pregnancy tests?

I'm currently 61 days late for my period. I've taken 4 or 5 tests now, and they are all negative. I'm on birth control me and my boyfriend and I are always careful.

I have an eating disorder, and yes, I know it affects my periods, but it hasn't been this bad in a while. And I think my doctor said I had irrelgar periods, but I can't remember now.

I know stress isn't helping, but I am worried now if there is something wrong again. My doctors are overbooked, and it's hard getting an appointment. Not to mention, my anxiety is awful. What to do, please?
61 days late for period and negative pregnancy tests?
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