How long after having a csection can it take before having your first period as I had my baby 4 months and a week ago and I've still not shown my belly has got bigger but I've taken pregnancy tests and all came back negative is this normal too?

I'm 25 years of age, I weigh 10 st 13lbs,

Medical history: frequent kidney stones, fowlers syndrome ( unable to pass urine as nerves in bladder don't work and bladder muscles tight all the time so have to self cathetorise waiting for neuro simulator to be fitted) problems with jaw awaiting jaw reconstruction I'm on 120mg mst morning and night 300mg pregabalin morning and night 20mg omoprazol morning and night