Talk to Gynecologist on Irregular/missed Periods

Hey doctor I'm, 21 unmarried. I was having regular periods untill November 2025 of cycle length 25-30 max then I started having my cycle Length 3-37 max to 40 from December to February 2026 Then I missed my periods in the month of Ramadan(march).I thought it was due to diet issues in ramadan and after ramadan month I got my period again in april.now it's again 40 days of cycle I haven't got my May periods yet. I gained weight so I started some diet taking high protein and avoiding junk and sugary drinks I went to 75.5 kg from 78 kg in around 19 days. Note: I don't have any severe any issue neither hair growth issues.(though I have breast hair a few)My skin is extremely dry even in summers.