As well as having cramps for about half the month, for about a week before my period, my mood absolutely plummets. I feel low, like I have nothing to look forward to, crushing tiredness and most upsettingly, severe anxiety and a constant sense of impending doom. I can't think logically during this time. I have struggled with low mood and anxiety since I was a kid but I'm no longer on medication or anything and I'm generally ok day to day. Is this a normal symptom of PMS and what can I do to alleviate it?