So normally I take 60mg of generic adderall but this time I only took 50mg and it's been a while since I took it. I was hoping for the you know million buck Adderall feeling but all I got was the chills, a stomachache and a headache. Is this because of the slightly lowered dose? Or because I haven't taken it in a while? Or something else entirely? It's been like 2 months since I last took it btw