Confused and emotional

I've been dealing with depression for a loooooong time (since age 13 and I'm 29 now). Most times are better than others. Sometimes its easy to get myself out of that selfpittying place and sometimes it not. Right now I'm having a hard time with my relationship (the communication is off....I'm super busy with work fulltime and school fulltime and so is he). I feel like I have to walk on eggshells for him not to get frustrated with legitimate things I may say to him and its wearing on me about us not spending time together. I'm usually not so soo emotional (to the point where I can't hide it) unless my menstrual cycle is coming soon (my calendar says it 8 days away). How can I differentiate between my emotions? I don't know if my feelings and responses now are what I'd be feeling a week or 2 from now if in the same situation. Am I just being "too sensitive"?