I agree with the above poster, you need to get to the root of this. Please, get a second opinion.
I don't know where you live or the type of hospital you have access to, but if you presented with a prolapse that is visible in the vagina, swollen stomach, constant spasms and large amounts of blood visible in your urine...........and all they said was that you don't have an infection..........you asked what you should do.
What you should do, in my humble opinion is get a second opinion as soon as possible.
First of all I am NOT a doctor and there is no way for me to know if what you are seeing in your vagina is even a prolapsed uterus. It is your other symptoms that are more concerning to me as a prolapsed uterus seldom presents with those symptoms.
If it was me, I'd have a friend drive me to a MAJOR hospitals ER for that second opinion.
Please let us know how you're doing.
RubyWitch