She has been fully potty trained for several months. Last week she started peeing in the house. I thought it may have something to do with her going into heat. Well now she is peeing CONSTANTLY. Seems to even be straining just to pee. The odor is a very strong tuna type of smell. We are getting her into the vet today. Worried it could be a bladder or kidney problem. Anyone experienced this before? I'm very worried about her. She's been eating and drinking like normal. Nothing else suggests she's sick or not feeling well.