My #2 DS and my #4 Ds both have ADHD and #4 also has ODD and I tell you #2 was a breeze except that at first i never wanted to put him on meds, we did and it was the best thing we ever did for him, he is now 13 and trying his first year at school off the meds and is doing well so far!!!!
#4 is a real test, I knew the day he was born that he was "different" and I tried to get help early on with horrible results so once again we tried to get help last year and we now have him on meds and they help with the ADHD but not the ODD so we still deal with his disrespect to authority and his bad behaviors alot, I can tell you thee are days I just want to run crying to my room and lock myself in...
It is very important that you take some time for yourself, you can take a class, or go get a cup of coffee ( or tea) for an hour or so once a week you can take a walk or even a long bath with the door locked and the music on, but you absolutly need down time, so please find something just for you, hire a sitter or get Dh to take them whatever you need to, but you have to recharge otherwise it builds up and then you either explode or fall apart.......