Relapses after Lemtrada

Hi, so I had my last dose of Lemtrada in 2016 and since then have only had ‘exasperation’s of existing symptoms’ which never constituted as a relapse. However, I’ve had a numb patch in the middle of back since May, ignored it for a bit to see what happened. I went to see a neurologist in the clinic I always do as my MS nurse sent me. She performed the physical examination and neither of my legs responded to the reflex tests and she said I had increased tone in both (always used to be in just the right). I wear an FES machine to help me walk everyday as well as one or two crutches depending on the day. The neurologist said she wanted an MRI, steroids then another MRI to monitor disease activity. However, the secretaries decided they were going to leave and the letters were never processed- yay! Fast forward and I started getting numbness and pain in my lower back, parallel to my spine and then finally last week my legs went really stiff. They are so stiff that my feet have curled under and it’s extremely painful to walk. My right leg tends to shake if it’s overworked which it has been doing if I try to manipulate my foot myself. The stiffness is with both legs. Saw my nurse last week and she said it’s a relapse (it’s lasted too long and getting worse) and she wants to give steroids. She rang on Friday and they are hopefully being processed for today so I have a GP appointment this afternoon. I haven’t had the best of luck with my practice before as they don’t seem to have an ‘urgent’ bone in their bodies 😂 the only relapse I can liken this to is the bad one I had before Lemtrada and I couldn’t walk at all for 5 weeks. I’ve had other relapses but I know this is a pesky one. Has anyone else had a ‘bad’ relapse since having Lemtrada? Thank you x