itchy and it's hurts to touch my lady parts

He either scratched you, or you were too dry and the friction caused it, or you got an infection like a yeast infection. There is an odd chance it may be an UTI, but you are not describing any urination issues.

Wash with only water and your fingers, keep yourself dry, avoid string panties, sleep without panties if it is safe to do so, monitor yourself for yeast, use an ice pack covered in a cloth to relieve the itching, spray yourself off with a small spray bottle and water after urination, pat yourself dry, take an anti inflamatory pain killer (NSAID) like Ibprofin if needed.