I literally just pissed myself

I am 19 years old and sexually active. I have been with the same partner for 3 years. Lately I have noticed that if I have to pee, I have to go RIGHT THEN or else I'll pee on myself. Like if I decide to hold it on my way home from work, I will pee on myself when I stand up out of my car. Anyone else experience this? Should I talk to my OBGYN?