Just think at the size yours is repair is probably inevitable, so take care of your body, you can exercise and you should just be mindful, don’t lift heavy weights or do any exercise that makes you hold your breath or grunt (like crunches), as it is known that exercises that make you hold your breath raise the BP momentarily to dangerous levels. You want to control your BP, high BP is the worst enemy of an aneurysm. So there is a fine line as to how extraneously you should exercise, but you want your body at its best!!! Exercise also helps your mind take stress out and lower any anxiety you may have about this ordeal. Find help like a therapist, anything that can help you manage the situation. Follow your Drs’ advice, you will be fine!!!