Reverse kegles - Strange sensation

When I am doing reverse keegles or when I try to relax the pelvic area, I start to feel urination senseation, and even it feels like the underwear become soaked with urinate (which always made me nervous and made me stop and check and see that everything is ok and nothing came out).

is is a common thing? how do you deal with it? I have to say that in the past when I tried to go deep into meditations I had the same feeling that made me stop.

Thank you