Maria,
My first thought was, why complain?
However, I do realize the possible seriousness of this new symptom. Yes, by all means, report this to your doctor immediately. You would offer this same advise to anyone else reporting this.
I know we've discussed this before and everyone disagreed with me, but I still believe you're pushing too hard. I think you need to be kinder to your back, but that's me and not you.
I hope this lastest episode resolves by itself in short order. You've suffered enough.
All my best, Dale