Get ya one of these https://www.amazon.com/dp/B01MT5FYIY/ref=cm_sw_r_cp_apa_i_0LtJFb7R8YB23
Vyvanse is one of those that once you're used to it , you really dont have to worry about eating immediately with it. When I took it I had one of those on my electric toothbrush. Id have to remove it to brush my teeth when I woke up so I always remembered . The only time I fucked up and double dosed was the same amount as OP and was a Saturday when I normally refilled it. I weigh more so it wasn't as bad...but definitely a little rough lol.
Also, I can't do this with adderall...even xr. If I wait to eat longer than 15 mins after I take it, I won't eat or just eat a tiny amount bc I eat small meals anyway so with Adderall oof. Cue nausea , headaches , and general feelings of unwellness while also not being able to relax and wait for it to pass. No thanks.