I'm 29y/o but still don't have a baby, I want to have a baby soon but I fear that the baby might have an illness/defect bcoz I use to take pills to regulate my period bcoz my period is irregular.. so please help me.. thanks!

Talk to your own medical practitioner.

Have you spoken to your doctor yet as to your medical issues?

Are you married ? Do you have a partner, who are you having sex with now ?
What type of birth control are you using now ?

Why do you think medication to regulate period would cause birth control ?