What Causes Abdominal/back Pain, Headache And Delayed Period?

hi im 28 I weigh 65kg and trying to get pregnant for the past two years now everytime I think I have pregnancy symptoms the doctor find that I have a cyct in my uteres and the other time just ouside my uteres he recommended I use fertomid for five days today I feel abdominal and lower back pain asosiated with headache and dizziness and my menstrual cycle is due 12th of this month im also very sleepy and my stomach has swollen please help me