I am not a doctor. Neither is the fitter at your LBS. I agree with the previous posters. Sounds like pinched nerves or a intervertebral disc issue, not inflammation. Ibuprofen may help with the latter but not the former. Best to not ride and possibly aggravate the situation. Definitely see a medical specialist, and once you do, get a second opinion from another. Insurance will usually pay for second opinions, but it may require pre-approval .