Sober Addict Starting CDL School with Accident/Criminal/Medical Check Questions?

Hey everyone I'm really glad I found this place. Seems like questions get answered here & ya'll regulars are real nice guys. Hoping to stick around. I've been a regular forum user all my life. Some BACKGROUND 1st: I'm 25 now and I'm looking to break into OTR trucking & start a career. I've had a rough, misguided life & I have some questions about my history with addiction in particular. I went into a rehab early April of this year (2016) & got out May 8th. My drug of choice was heroin. I am completely CLEAN & SOBER now, since early April.

My Question Is This: Now, are companies I apply-to going to receive information about my past prescriptions to suboxone, or that I went away to rehab April til May? Is that available to them & will it effect my employment? Can it effect me passing the DOT requirements?
I was also arrested a couple years ago (just for possession, nothing related to driving) however the case was expunged & I do not have a felony strike. I have been told that I am legally able to keep this arrest off of my job applications in my state. Is this arrest going to show up on my criminal background check?

Finally, I know that I've been in two accidents (both were determined the other drivers fault) & I am wondering how these are going to effect my employment prospects. A year has passed since the last one, and my 1st accident was 3 months prior. The 1st was due to a man running a stop sign, the 2nd due to a woman speeding into the turn lane as I was turning to enter a parking lot. Both were early 2015, one year ago. Do I definitely NEED to report these when applying?

I would really appreciate any help with these. I am afraid of spending the $$ only to find out my history will continue to haunt me. Any help at all is really appreciated. Thank you so much!!!

 

I'm sorry, I am from Connecticut Thanks for your reply.

 

I am not on any prescription medication, I am 100% clean from drugs & alcohol. I am just worried that my past medical history (I was on maintenance medication for opiate addiction in the past, & I did go to rehab for heroin addiction this year) will show up in some sort of background check. "The DOT Long-Form" concerns me. No, I have never failed a field sobriety test. I have never failed a urinalysis administered by an employer or an officer... Just medical drug tests, to qualify for initial maintenance medication (and to qualify for rehab)