Havnt had my period in a really long time?

Ok well i know my age says that im like 20 something but im not im a teenager and im just wondering if i should see a doctor. I dont want to ask anyone i know irl cuz im shy and can't do that literally. Anyways on to my point i havnt had my period since like the begenning of the year i havnt been on birth control and im not pregnant and I don't know y i havnt had it in a long time.. i am irregular so i have my period every 3 or 4 months but i havnt had mine since the begenning of the year. Im not sexually active or anything. Every few months tho i get cramps then a very VERY VERY light period like there is a very little blood and a lot of discharge but thats like nothing basically. Help? What should i do?
Havnt had my period in a really long time?
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