Lumbar leak post disc surgery

I developed a leak after emergency surgery in May to decompress a disc and relieve stenosis. (Whilst abroad in Canada on holiday) I have a moderate degree of osteoarthritis in my lower spine. The leak became symptomatic after about 8 days. I developed a large bulge of fluid just under the skin and it was only diagnosed after 4GP visits and 3 ED visits on the 2nd MRI.
The surgeon strongly advised against trying a surgical repair and declared it too big for patching. That bulge has now resolved but I have persistent pain and get symptomatic (headaches) if I’m too active. I can walk about 3k only. I used to be a fit runner regularly running 10k. I can feel pressure building in my lower back around my sacrum and coccyx. I have to lie down to get relief
My GP doesn’t accept I still get headaches from it saying they are tension headaches.
My question is Will I eventually be able to be more active and resume more normal daily activities. I currently avoid all lifting etc

CT Australia