What could my symptoms mean or are they even related?

Let me start off by saying that I will be going to the doctor soon. I just wanted some other opinions while I wait. First, I need to mention that I have Crohn's Disease. I have pretty much had it under control for over a year now. I am now on day 37 of my menstrual cycle without any sign of my period, except a little moodiness. Once in the last year I had a cycle that was 35 days, so this is the longest. I have had 3 children already and my youngest is 15 months. I stopped feeding him when he was almost 7 months. I have had regular periods since he was 3 months old. My average cycle is 31 days. My last period last 3 days with a medium flow and the one before that was only 2 days. Normally they are atleast 4. I also am not on birth control, but we use condoms and I track my cycles. Anyway, my symtoms are missed period, sinus congestion with a little drainage, fatigue, muscle soreness, headaches, some slight nausea off and on(not very often), bloating and fullness in my lower abdomen and a sore throat. I have also had trouble getting to sleep at night. What could these symptoms mean and are they even related? Could I just have a bad cold that is causing my late or missed period?