I had just typed a response to you, and the computer did something odd and I lost it. If this is a duplicate answer, please ignore.
This sounds like a woman who has been taught to be very polite and not hurt other's feelings at all costs.
Everything she is saying to you is code for "I'm not interested" but she is trying to be too polite and ends up confusing you.
When someone says "I need space" it means they are trying to let you down gently...just like "you're too good for me" , etc.
I believe she thought asking about your surgery was just the polite thing to do...but it seems silly in the context of telling you she needs space.
Seriously, find someone else. This girl needs to learn to be more direct, and will just continue to confuse you.
I know you can find someone who will appreciate you!
Please click on ACCEPT if this has been helpful.