43 day cycle, no period since Jan?

An

My cycle went from a 30/33 average cycle length to a 43 day cycle since the year began.

My last period started on Jan 16th. I am usually irregular, but this is odd for me. And the preg test I took after my missed period (Feb 25th) was negative.

I don't have any period precursors, such as sore breasts, back ache, acne or or anything else, or pregnancy symptoms.

Soooo... I don't really know what's going on.

Also, I can't afford to see a doctor.