period late but I'm a virgin

So I'm a virgin. Well at least I've never had sex before. So recently like maybe two months ago I met this guy. We got into things. We might have kissed a couple of times and maybe he might have fingered. And I might have given him a handj. And he came.. But he never penetrated me. I don't think I fingered myself after I gave him a handj. But since then my period was late 5 days then the period after that came after 15 days and now I'm still waiting for the 3rd consecutive period and it's been 33 days already. Also I've been under alot of stress from studies and people and life around me. Could anyone help me out and tell me what's going on with my body? Here's another thing. I rarely have irregular periods.