She's 8 month old and has just come out of season. She wore diapers for 2 weeks and now she pees involuntarily...

Hi Micharran and welcome, your fur baby could have an infection, diapering can cause this. A trip to the vet is probably in order. Check back and one of the many pet experts will see this and maybe have better advice. Good luck

Always a good idea to rule out infection. I'd book an appointment. If it is not an infection you may be dealing with an incontinence issue, though she seems awfully young...