Hi lynnly - I'm so sorry you are suffering! I agree with Val. Definitley get to your doc and get some nitro or diltiazem and use stool softeners and take warm baths. You may very well beat this dragon soon! Since you've had an LIS, my guess is that you can probably heal with the ointments, stool softeners and baths.
It is not common, but also not unheard of, for people to need a second LIS (there have been a few older boardies here who had to have that). So if it comes to that, you shouldn't worry too much. If you have a good CRS, s/he can tell you if that's a good option for you. But in the meantime, I second what Val said - I don't think you need to panic yet. But defintely feel free to come here to vent - we all know what it's like to live in fear of the dreaded butt pain!