Cystoscopy and epidural

I had a cystoscopy yesterday helped by an epidural injection. Everything went well thank God !

I have a blood patch now where the needle went . Nothing was explained to me about what this did. Or if they did I probably wasn't listening. 

Anyway how do I leave it on for ? Do I remove it myself  ?  So many questions that I can't get answers for I appreciate any advice and help.

Thank you

Chris