Should I ask for a review now?

Hi all, haven’t been on the forum for a while after getting an award last October. The award was for 2 years, until July 2020 but I know they tend to review at 12 months. When I had my assessment I was surprised they awarded me enhanced mobility - I had previously had standard and marked my form accordingly but the assessor said I was worse than I thought! I had another operation in February this year (was off work from September 2018 and have now taken early retirement) and am having more physio but I would say my mobility hasn’t improved but when I do the review should I say I can walk 20-50 meters (as I said last time) in which case won’t they ask me why I haven’t asked for a review before? So , now the operation is over would it be a good time to ask for a review ? And if I do , do they stop all benefit unti” they assess me. I hate reviews! (Who doesn’t!) Thanks in advance for your suggestions