Late period? Pregnant? HELP

So I took the morning after pill in August and in September my period came on the 9th which is fine: Usually my periods come on the 13th. This month which is now the 19th of October, I haven’t gotten any period?? Took three pregnancy tests a few days ago and both came out negative saying I’m not pregnant. Not trying to conceive anytime soon since I’m still young! Is it late? Or is there a chance I could be pregnant!! My periods are also usually regular and my cycle is 32-35 days! I’m starting to get worried..