Day Three of taking my new pill. I am experiencing some nausea. I wonder if that's to do with my cold though, or if it's actually definitely the pill?

I had a dream last night. I was in the back seat of a car sandwiched between my mother and my father, being driven somewhere by their accountant when my dad hit me very hard on my arm. It was so shocking that I whimpered and pressed myself against my mother's side. I woke up shortly after, as though the hit had jolted me out of sleep.