Not much info on it but people who have experienced the combo with the same situation. I have also used this and it works quite well, some reports mention hallucinations(auditory/OEVs.) I didnt get them from Seroquel, but experienced the same delightful "Dream-Like" hallucinations from Ambien =D.
Im not sure how often you take Adderal and your usual dose, but 70mg is pretty high for someone who doesnt take it often and or use to a smaller dose, could leave you up for days. I personally do it once a week mostly, 125mg at around 10pm after being up all day, and end up going to be 10pm-2am the following day, sleep till 8 strangely well rested when I wake up. You just have to judge how long a certain dose will keep you up if your worried about using seroquel to get to sleep but I wouldnt be worried to do it in the future if you didnt already do so.
I know this is a day later sorry =\