Planning trouble

Every single time it’s a week before my period I eat a lot, feel nausea and get hot flashes. It all feels as if I’m pregnant. But my body always plays games with me, and I never am. I want a baby so badly. I have a soon to be 9year old, she wants siblings. My boyfriend is 53 and I’m 30 I’m worried I’m running out of time. I went to see the Dr. because I thought something is wrong with me. The Dr. said I have 3 large and 4 small cysts on my ovaries😔 it’s been months, it takes long for them to go away. I need help. Is it not my fault? Could my boyfriend be too old and not have enough ejaculation to make babies anymore? I’m worried because I’m planning to marry him.