Im unsure but i think its just cause im a bit ill,but im 5 days late

I was very ill on the day i was supposed to get it, and so over the past week since then ive been very up and down and stressed. Living in northern thailand as well. Its the smokey season so its very polluted right now which has given me quite the cough

Im really active and a full time martial artists, so not having my period is putting me more and more on edge now mentally.

Is it just cause im ill and a bit stressed that im missing my period right now?

Boyfriend went home in january so no sex for me until may, so it cant be that 😁 just curious to see some thoughts.

My period is sometimes quite irregular as well, im either early or late, so im thinking about getting birth control pills to help with this and with my flow in general.

They are pretty cheap here and easy to get where i live, but ive been a bit hesitant the past few weeks as im worried about the weight gain/loss or skin reactions/mood changes. Should i just go for it?