Lower back pain months after lumbar puncture

So a few months ago I've had a lumbar puncture and I can still feel pain around the area where the needle was inserted. The pain is somewhat dull, when I press on the bone around where the needle was inserted I can feel that exact same pain that I felt when the needle was poked in and the pain that remained for a few weeks after. I'm not too worried about this though, what worries me is that in those last few months I have been having lower back pains which stem from the area where the needle was poked in. I can't sit down for longer than a few minutes because I start feeling like my back is broken and I get very worried as I feel like I am making my spine worse every minute in which I countinue to stay seated. I can stand up fine and I don't feel any pain standing up but when I'm seated on a desk chair I feel pain. I am also fine when slouching on a couch but that's about it. Has the NHS f**ked my back over? I don't see how it can be healed, it's been months and nothing has improved. Will doing weight lifting to strengthen my back fix this? Or will my back always feel funny? Thank you in advance.