Persistency?

A problem I have with masturbation is being persistent. I rub my clit and it feels good, but I end up stopping every once in awhile because it feels so good! It's not like it hurts or anything, I just need to take a couple seconds for my body to calm down again. I feel like if I didn't do that I'd climax faster.

I haven't been able to make myself cum yet, but do you think I would be able to if I was persistent and didn't stop?

What advice can you give me for clitoral stimulation??