Y'know, it wasn't so much the severity (I've experienced some pretty rugged pain) as much as the constant, nagging, continual misery. Weeks of it.
@Gary O' This! Not just the wretched pain, but the fact that it's unrelenting. I'm pushing two weeks so far, and it's pretty miserable.
I have a really high pain threshold. 5 kids, natural childbirth at home, no meds/drugs, no drama, trust me when I say it's high!

This crap has brought me to my knees.
I went back to the doc yesterday and got gabapentin, which is a nerve blocker, because the OTC stuff wasn't doing much. I can deal with the pain during the day, it's the nights that do me in. And not sleeping and being exhausted makes it that much harder to deal with the pain, plus exhaustion and not sleeping slows the healing. So it's a vicious cycle.
The gabapentin helped more than the OTC stuff did. I slept several hours without waking.
I don't have an extensive rash. Five different areas of lesions wrapping around my back to my front, below my waist. Nowhere near as bad as some pics I've seen. It still shocks me that such small areas could produce such severe pain. But it's not what's on the surface, it's what's happening beneath the skin, what's happening with the nerves and nerve pathways. That's where the pain comes from.
I have pain where there are no lesions. Deep pain. It's wild.