I take 2 sometimes 3 ondansetron 4mg pills everyday for my horrible morning sickness... is this bad for baby?

Probably not: Ondansetron is a class b drug and so is considered probably safe in pregnancy. No studies have reported any birth defects.

Not likely...: Here's a really great summary of recent findings in the prestigious n.E.J.M (2/2013) that support ondansetron's safety during early pregnancy. http://www.nejm.org/doi/full/10.1056/nejmoa1211035.