I do not take rit regularly, nor have i ever, but i will tell you that the one time i did take rit and e together did not have a good result. It could have been an experience entirely unique to me, but it was enough that i feel obligated to share it with you. I took e and rit and smoked pot...the combination was horrible. I experienced what i would describe as a panic attack, albeit internal. I was paralyzed with anxiety and negative thoughts for a good 30 min. Since then, i have not been able to smoke weed without anxiety, so i quit smoking. I can't say this would have happened without the combination of all three...the weed was the third drug into the mix and the one that triggered the event.
This may be highly unlikely to happen to you, especially since you already take rit. I genuinely believe you'll be fine since you took the rit in the am and you didn't take a lot. I would just advise that you try to avoid smoking weed til you feel the rit is out of your system, not that you mentioned any intention of smoking...just wanted to caution you that the combo in my experience was not a good one.