4-5 periods in a year. Help me out!

Hi, I am 24 yrs old working, My mensuration cycle started in 2016.andvsince than I am having irregular periods like 6 times in a month but from last few years the frequency has decreased a lot. I am having hardly 4-5 periods in a yr and Skipping periods for straight 6 months once. Again since 3 months there are no periods. Last period date : 8th February 2020 Second last period date : 25th October 2019 I am not on any medication right now. I was on medications 1.5yrs back for anxiety and depression for around 3yrs (stalopam, zapiz etc.). No heavy bleeding, strange discharge or pain has been observed. Pregnancy test is also negative. No excessive growth of facial hairs. Breast seems to be normal. I am really worried if some serious issues are there!! Please help me out!!