Worried Post Surgery :- Decompression + Foraminotomy [laminectomy ]

Almost 5 weeks on:- Post Decompression + Foraminotomy Surgery [no fusion] for Lumbar Stenosis.. This was carried out by a top neurosurgeon who deals predominantly with"Complex Spine" problems in the UK. I have Still got some leg pain but now much better, however now i have terrible lower back + tail bone pain , i did not have this pain prior to surgery i only had leg pain. i am now getting quite worried about this & the success of this surgery. finding difficult to walk any distance due to this LOWER BACK Pain which i did not have before the surgery, so the pain is now much much worse than before the surgery, there is a good improvement in the leg pain, but i now cannot walk [ dont want to walk] due to the lower back pain which is much worse than the leg pain i had prior to surgery. I am hoping some one who has had this surgery can reassure me that it will get better…right now i am regretting having had the surgery