Late period! HELP

Audrey

So I took the morning after pill in August and in September my period came on the 9th. Usually my periods come on the 13th. This month which is now the 17th of October, I haven’t gotten any period?? Took two pregnancy tests 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 30-35 days!