Could be anxiety or panic disorder too, due to such a traumatic event in your life. Best to get evaluated. Not sure if you are male or female, but if you are female, I have noticed my menstrual cycles have a LOT to do with my moods. A normal cycle has roughly 2 weeks of increasing estrogen leading to ovulation, then decreasing estrogen & increasing progesterone leading to your period if not pregnant. On the pill or birth control other than condoms or the copper IUD this obviously changes because hormone levels differ on the pill/Mirena/Nuvaring, etc. Just wanted to throw that out there. The femaie hormones definitely play a part in my moods. I do have panic disorder too, from being an accidental victim of gun violence.

My advice to you is to get a professional opinion. It is very strange for bipolar to be consistently 2 weeks on manic, 2 weeks on depressive, like clockwork.