Try bathing with luke warm salty water - make sure its tepid water because hot water will make it more itchy.

Any plain unscented moisturiser should get you thru until you next get to the pharmacy next. Another soother is 1 tblspoon milk in 1cup tepid water or even better if you can relax in a bath with 1cup milk.

My friend is a tattoo artist and she experienced the same thing.

Good luck