Pms syndrome symptoms and conditions

I've noticed that when I lay down my arms and legs and stomach jerk. Sometimes the movement is so strong that it wakes me up. One time I woke up thinking I was falling. Also, horrible memory loss. One day I was home cleaning my house and I forgot to pick my 8 year old son up from school. Also experience fatigue. My gynecologist has prescribed 300mg Wellbutrin and 80mg of Prozac for my depression and PMS syndrome. I'm concerned because everyone is telling me I should be monitored while being of this medication. Also, I question my decision making. Another thing is I was always scared of rollercoasters -- well, on this medicine I can easily sit in the first seat of a rollercoaster ride and go on it 4 times without being scared.
That also makes me nervous. Headaches, sleeplessness, dizziness and lights are too bright.