small painful lump on back of head causing shooyting pains, pressure and severe headaches? i have had this lump on my head for two months now. I have had three dr.s look at it and they all said they think it is a cyst. I am currently 40 weeks pregnant and past my due date and they wont do a catscan or mri till the baby is born. It has been causing sever pain for the past two days and last night when I stood up I almost fell over, i felt like I was on a boat in a storm or something. I keep taking tylenol but it doesnt work and my dr.s wont induce me. what am I to do and what could this pain be? I didnt know a cyst could hurt this bad and since none of the dr.s actually took tests i dont even know if I trust that it is a cyst. I am so worried. advice please

Summarized question: Could you please provide information on a small cyst on the back of the head that causes extreme pains and headaches?