Talk to General Physician on Menstruations

Medical history : Have no previous monthly cycle related problem but since the very beginning eating any sort of medicine, even if it is just panadol, causes less flow. Problem begins with the day of second vaccination dose, as I had high grade Fever, so took medication during the days cycles were expected. As a result had 2 to 3 weeks delay. After that it was regular for 2 months but the delay and irregularity causes weight gain of about 8kg within weeks when the deit was the same as it was before. and now in January I again had 2 weeks delay with alot of pain, backache and much more... but with minimum flow, may be I can call it just spotting. During the January cycle developed the symptoms of covid and proceeded with the treatment.

Current Scenario : Recovered from covid but February cycle is completely irregular. Its been 5 days on and its just pain along with lower abdominal heaviness, headache, backache. Almost it's again no cycle month.

Query : 1. What should I do? Wai