Peptide Help - feeling very sick

Injected rat with .5 ml reta & .5 ml ghk cu yesterday for the first time. Ghk cu stung and left a mark for quite some time. All day today rat has been feeling sick, nauseous and headaches. It is also period day 2. Ik ghk cu is meant to be administered everyday. Should injecting continue? Lower doses? Please help. Rat cannot eat or drink and feels super sick