yes it's normal and yes it sucks! at least you figured it out. i was oblivious as to why i wanted to scratch my husband's eyes out wanted some time in bed so that made me worry. now i pay attention to my cycle. it has helped some to know WHY it's happening but it hasn't gotten any better.
i also have heavy bleeding and more cramping than i used to. and my period is longer with off and spotting for up to 10 days. it seems i barely have any time during the month where i'm not PMS'ing or bleeding :(
i hate being on bcp (makes me sick) so i haven't gone that route yet. i am hoping that by clearing up my constant headache (cause undetermined-sinus, migraine?) and my anemia (from all the blood loss), that i will be tolerable again.
oh also i have hypothyroidism so i am always tired.
anyway, what i'm trying to say is that if you have any other problems going on, PMS is worse so see if you can't fix other stuff too.