Has anyone found that PMT is worse after having babies? Or as they get older? Or with different types of contraception?

Maybe it's just because I went so long without AF with pg and bfing, but I now find PMT so much worse than I remember. I would love to not feel so angry each month and was wondering whether it was just my age, or something that just happens when you've had babies, or whether maybe I could minimise it by changing contraception. Any ideas?