Can you get PMS when your menses is not back & is fully breastfeeding (latch & pump)? I'm currently 4 mths PP, lately I am feeling pretty moody. Gets irritated easily & feels depressed.

Well it really depends on individual. It might also be post natal depression. You may wish to speak or talk to your spouse and see if it improves. Else, you may have to seek medical attention. I wouldn't say this is normal but kind of common. You need to help yourself 1st in order for others to help you.