Next menstrual cycle time

Patient: I did sex without penetrating and for precaution i had mifeprim tablet and zitotac tablet in vaginal, i took it on july 15th and on 18th inserted zitotac tablet in my vagina. till now i did not get my periods. iam very much worried. when will i get my next periods?

Symptoms: When will i get my next periods?

Doctor: