4 days late of period. Possibly pregnant?

you cannot become pregnant without penetration and ejaculation. most couples find it hard enough to conceive a child and try for 2 years. yes irregular periods are quite common when there are factors such as weigh gain,weight loss,stress, etc involved. if she hasnt gotten her period in a while i would recommend taking a pregnancy test just to get the concern out of your mind and than get her some birth control