I have a pus pocket underneath my index finger on palm side. I have been diagnosed MRSA in 07. I'm in a lot of pain and scared.help!

Go to your doctor. Do not poke at it or try to drain it yourself. You may need a course of antibiotics for this.

It may not be too serious but if it's bad enough to ask about it here it's bad enough to have it looked at by a medical professional. They will drain it for you if needed and provide prescription antibiotic cream, and if it isn't bad enough to bother with then you will at least get peace of mind out of the visit :)