HELP! Will My Criminal Record Keep Me From My Nursing Dream?

I have been thinking of asking my online friends a question, that ive tried to find the answer to.

The thing is, I have started to school to be a LPN, or an RN. They do a criminal background check. I have no felonies, n no actual drug charges, i say actual, because i have drug related charges, prostitution, possession of paraphenalia, and im not really sure, but i might have a charge of child neglect. The last of these was in 95, n am not sure that i did the time or paid the fines associated, but i do know ive had a couple of tickets, n they have run my license, n i have even stayed the night in jail over a no insurance ticket i didnt pay, since then.
 
i have told them about the insurance ticket, n an inspection sticker ticket, because they were in the last 10 years, but im wondering how much i should offer, i would not lie, i just dont wanna offer TMI!!! i want to know what they'll find. if u know the answer or could help me find out, i'd appreciate it.