My husband and I just got back from the movies and we moved the cat from her spot to sit down and she hissed at ym husband which is not normal for her she's usually always happy and puring and I tried to pet her and she batted and me and hissed and ran off and hid and is acting like someone hurt her. My roommate was home asleep with his cat but his cat seems fine. We recently took her to the vet to get vaccinated about 5 days ago could she be having a reactions to the meds? Or does anyone know what could be wrong?