I have a 8 yr old Pomeranian. She's from a puppy mill. Will she ever stop submissive wetting? How? When? HELP

I rescued this very loving, very shy dog from death after 8 years of having babies. She is so submissive, that she pees every time she approaches or is approached. Is there any way to help her stop? She also becomes spastic when I put a leash on her. What do I do?