Have you asked your doctor? What information were you given at the time you got the injections? Do you know what injections you got, as there are a variety of recommended injections depending on where you are going?
The only one I know about, is that you should not become pregnant for a time after taking anti-malarial drugs, but I am unsure of the length of time, and it may vary depending on which drug you take, so you should read the literature that comes with it.