My emotional reactions are faster, more intense, and more frequent when I am nearing or on my period. I've coped by learning that just because I'm having feelings does not mean they reflect reality, nor should they be acted upon. Feelings will pass. If you know ahead of time that your period increases suicidal feelings, in addition to speaking to your physician about this, you can cope ahead to deal with the feelings when they come. Make a list of things to distract yourself. Look into finding support from friends or other loved ones, like having someone call and check up on you every day or two to make sure you're okay. Be sure you fill your life with more pleasant events in those days to avoid falling into depression. Taking steps like these can minimize the impact of heightened emotions around that time of the month.