Anyone have PMDD

​I recently started my cycle again in february  after having LO. We'll last month on the first day or my period my anxiety was crazy , I already suffer from panic attacks . I was extreamly weak , and felt off ! Not At all like my normal cheerful self . I thought I was dying and that made my anxiety worse especial since I think I had a small cyst and was hurting pretty bad ! We'll I'm a week late , but this afternoon I got extreamly weak , and I blamed it in having problems with my sugar  so I ate something and eventually I felt a little better . We'll I'm really light headed , my anxiety is really high and I'm very naseous . (Idk if that's a symptom ) but I googled differnt things because I've never had this problem before having my LO and I stumbled across post about PMDD . I'm wondering since I already have wacky hormones from BF and since AF causes a shift in hormones if it could be PMDD that's causing me to feel "off" I just feel strange , of course I can't diagnose myself because by no means am I a doctor , but I haven't taken a pregnancy test .. Yet ! I'm trying to wait to see if my period starts ! But if I'm pregnant then that's probably the culprit . However if it's not it has to be something causing this !? I just don't know what !! Anyone have PMDD and care to share their symptoms and how they handle it ? Or how they knew something was "off"