Call your doctor and ask the side affects, everyone is different and it could be possible, but then again how late are you?

There's a lot of questions to be asked really.

Are your periods normal? Do they always come on time or are they late a lot?

Having any pregnancy symptoms? Sore boobs/nipples? Nausea?

It's hard to answer someone's question when they ask if they're pregnant or if this medicine is causing this and that, you know yourself better than anybody!