Flexibility and blood circulation

For context: I am a 28 year old female. I had a spinal fusion to correct my severe scoliosis when I was in 5th grade. I have a few questions for anyone who else who has had a spinal fusion.

1. when you stretch, do you find that after 30 seconds or so, whatever you’re stretching goes numb?
2. are you able to sit comfortably on the floor? I have tried almost every sitting position you can do on the floor and my feet always go numb within seconds
3. when you go to the store and are holding the basket with your groceries in it, does your hand go numb if you are holding the basket in your elbow? I experience all of these and not sure if it’s just another normal experience and symptom of having metal rods and screws in your back 🙃 I would love to hear your experiences!!