Irregular period cycle, heavy & painful period cramps

i’m nineteen years old, and ive always experienced irregular period cycles.
i started my period quite late in life than average (i would say), just 2 and a half years ago.
i thought, the first year, having irregular cycles were normal for someone who just got their period but it still happens to me till this day. i would say that my lifestyle is decent. i exercise, i watch my eating; i make sure to supply my body with as enough nutrients needed, i do not get that stressed out very often, my social life is pretty decent, and i also get moderate sleep. i always remember to drink water, and i have a normal bmi.
to a certain extent, i would say that i am sexually active, and on rare occasions, i take in morning after pills like escapelle, or postinor.
sometime last year i did not get my period for a few months straight, this was probably the third time around that this occurred.
at times when i do get my period, i experience heavy, painful cramps, to the point where i resort towards pink painkiller pills for period.
i have been meaning to consult with a doctor, professionally at the clinic, however i do not have the financial means for that.
recently, i have been extra worried about my “condition” and thought to finally bring this subject to light. maybe there are also people out there who experience this same unpleasant thing that i do.

i understand it is not possible to fully diagnose a patient based off of a limited set of information, without conducting necessary physical check-up, but a little insight of what i might face/ be going through would be helpful to spare myself the overthinking.
surfing the web for little answers like reading up on yahoo definitely does not give me a reliable-enough information.

my prediction is that i probably WILL be advised to consult with a doctor, but given my situation now which restricts me from doing so, what other suggestions could i do as an alternative?

that’s all for now, thank you for reading.