Mental health. Questions.

So I had the iud after I had my second baby back in November of 16, kept it in for 6 months and took it out because of the hormone changes and the mood swings were driving me insane. Well I was “normal” for a while but now I’m back to my bitchy self, I’m always in a mopey mood and I’m always in a bad ass mood as well. I always have a dang attitude. I’m not on birth control or any type of medication for that matter. I just feel so run down and depressed. My life is great. I have no reason to have mood swings like I am. Should I talk with a pcp? Or just leave it? Idk if it’s even worth it. I just don’t have energy and I have a fuck it attitude constantly.