Irregular periods, should I be worried??

My cycle is way too irregular like last time my period ended on 26 April and the gap between cycles is long as well, sometimes it's 30 days or 43 days.

And I haven't gotten my period yet.

I have heavy flow on a few days then extreme light on others for a few days.

Also to add: celibate, ADHD, low energy and low on iron and I heavily depend on caffeine, I do exercise and eat healthy with protein included.

Should I be worried that my periods have such a long gap and are so light??