late for my periods for almost 10 days

21F, kinda freaking out, i had protected sex on 28th December. According to my cycle i was supposed to get my periods around 6-7 january which i did get. But for the month of feb i was supposed to get them around 8th or 9th, i still haven't had them. Usually I don't get late, even if i do it's for 3-4 days not this long. is it possible to get pregnant after i have had my regular cycle once? should i take a test? ps. if it matters, i have started smoking recently and i might have done it 3-4 times since jan. im posting this here bec askindianwomen and twoxindia deleted my post and im kinda desparate

Edit: I took a test w the first urine this morning, it came back negative ao im most likely not pregnant. I'll wait another week for the periods, if they still don't occur, I'll take another test or go visit a gynac. Thankyou for the DMs and the comments, really helped me a lot.