Period lates 4 days and still doesn’t come

C

The period comes right before. But this time it lates 4 days now and still doesn’t come.

We made love about 2-3times last 28days, with wearing condoms right every time of course.

Got allergic 2weeks ago and started to eat anti-allergic pills and use anti allergic ointment 1 week ago.

Not sure if that made period late. Feel confused and worried about it.😣😣