Topimax and pregnancy?

Has anyone ever been on topimax and gotten pregnant by accident? I have two beautiful children and have always gotten off topimax (for migraines) before. I just found out that I’m unexpectedly pregnant (4 weeks and 2 days). I’ve been on Topimax as my husband and I were actively trying NOT to conceive but alas it happened. I’m freaking out as topimax studies have shown almost a quadruple potential for cleft lip and cleft palate.