I need help

Morgan • Firefighter 👩🏻‍🚒🔥 first time mommy 💕 baby Ellison due may 26th 2018 😍
So I'm taking penicillin, and last night I expirenced hallucinations like I could see colors, and it was crazy..but I have been taking robatussin cough syrup because I am sick I had strep now I have a cold with a cough, and I was wondering if anyone has ever expirenced this before because I'm scared to tell my dad because he might think I was on acid, if I told him what I saw but I'm just light headed now so I think I have to stop taking one so I don't trip out again cause it was a little scary.