Might having multiple x-rays as a child affect fertility?

No: It is not known to have that effect. There are some other radiology tests that if repeated many times could affect the ovaries or sperm but those are uncommon unless someone was very sick with something like cancer. Xrays should not cause any problem.

Doubtful: It depends on body location of the x-rays and how much exposure you had but it is unlikely you had enough to affect your fertility. Seeing a specialist would help you in determining this though.