how long after cerazette have people got pregnant

Hi

i took my last cerazette pill on 21st april, had my first period 2 weeks ago and im sure i ovulated last week. Me and my partner had sex quite a few times that week also and today i woke up in the night needing a wee which i have never done before, also i have been having pains in my lower stomach.  Has anyone else experience this? Just kinda want to put my mind at rest that there is nothing wrong

Thank you