Working out + supplements

Hello all. Been on Prozac 2 months, at a 20mg daily dosage all the way through. Can confirm it has been affecting me positively and I haven’t been as manic. Anyway, I joined the gym recently to lose the Lexapro weight, and my trainer suggested that I begin creatine. I’ve taken a scoop in water today, timing it out from my daily SSRI, and my body feels feverish. My urine is also neon yellow. I can’t speak to my NP until tomorrow, but I was wondering if this is a one off thing while my body adjusts? Has anyone else gotten into a fitness routine or added supplements while on this medication? Thanks for reading my rambling.