Soooo, how do you know when you are moody around that time of the month whether it is just PMS, bipolar moodiness, or the bipolar causing pms?

I have been in odd moods recently and it is pms time. Not nearly as energetic and hypo like I had been recently, and I did just go up to 900mg of lithium last tuesday. I am more tired, less motivated, slightly down, but still get some anxiety and a general attitude. The attitude doesnt have the physical adrenaline rush stuff with it, more I just feel like being a jerkwad sometimes and harping on people. So I dont know if i am still hypo and the lithium hasnt kicked in fully yet, or if it is PMS. Oh, also, my sensitivities to what people say has went up, more in that rather than react out in anger, I just get an attitude but am really more hurt and can see that I am hurt by whatever at the moment. I am guessing that has to do with other issues, like actually processing my insecurities rather than just acting out because of them. However, this anxiety I get when I put on my makeup, that can go. I never had that before and all of a sudden, everytime I go to put on my makeup I get all anxious. So not sure if maybe I have anxiety issues on top of the bipolar. Would they determine that based on whether or not the anxiety sticks around after the meds are controlling the bipolar? It wouldnt shock me. My mom has anxiety issues, used to have horrible panic attacks, and she said they started around the time she was my age.