dont really know about wheelchairs- so, sorry for butting in

- but if something similar happens in a car, first thing to check is if one of the tyres has too little air in it/is somewhat deflated...
if after putting air back in it keeps deflating over time, you've either got a faulty valve or a slow puncture
re "to wheelchair or not to" -as so far everyone on this thread has opted for 'to wheelchair', I' ll put in my experience with the 'not to' decision- (well...part of the 'decision' was due to being far too perma exhausted to actually 'fight' for one...)
so yep, there was a time, a v v loooong time, years..., when I really 'wanted' one- but I also really dreaded 'having to'-
for me 'wanting to' was due to evil chronic pain and exhaustion/literally overwhelming 'fatigue' (at my worst 20-30m walking felt like climbing mount everest and I'd literally 'drop off to sleep' from one minute to the next at the most inopportune places and times)-
but I had no dislocations(!!!!), just some mildish subluxing.
and the 'dreading having to' got me to a 'weird' decision- I decided that I would try to enjoy (!) every painful, knackering step that I was able to make - 'for as long as I WAS able to make them...' as I then thought/worried...
and I started to try really 'pacing' and ever ever so slowly 'pacing up' - t'was a v long, v hard journey- I had years of v dire "life??? what life?????!!!!

" -
and improvement from 'pacing' everything, trying to exercise/do physio- sure felt mostly like "what improvement!!???"
but after some 5 years (

yep that bl*&^% long) I realized my ability had actually improved 'massively'!
I had started to wake up 'awake' and no longer 'hit by a truck', a supermarket shop for example had become 'fairly easily' do-able (but nope, def not pain free), I could put away the shopping straight away before having a little rest etc etc
a few years on- on a good day I can walk a mile + (a couple of little sit down breaks are still mostly necessary though for that kind of distance) , not pain free, but def without badly increasing pain levels and without getting totally exhausted (yep I will need a rest- but I dont 'crash out'/fall sleep any longer...well,

if I attempt to/force myself to walk that kinda distance on a bad day... I have been known to afterwards crash out for a couple of hours)
that said... I have no kids, I havent worked in years- which I think made a huge difference to how possible ever so slowly 'pacing up' was...
and the "what life???!!!" years... were truly horrible!!! (if I hadnt in that time also learnt to 'see and appreciate the little, little things"... I probably wouldn't have coped at all)
so my feeling is... use a wheelchair if that gives you more of a life... BUT still try to 'pace up' your walking ability (v slowly, v gently) and/or try to compensate the lack of 'normal' muscle/body activity with doing physio/other exercises (swimming/cycling which btw def helped me to build walking stamina)-
which of course

you also have to slowly, gently 'pace/pace up'
xxg