My CH girl, Creamsicle, didn't come into heat for the first time until she was around 6 years old, believe it or not, but when she did, it was maddening around here. She'd be in heat for a few days, then out, then in again, etc. (She's the only cat I hadn't gotten spayed b/c of her CH and deafness. I was scared to death to put her under anesthesia but I worried for nothing. There were no problems at all.) I had several spay appointments but each time she would come into heat and my vet didn't want to do the surgery then. Finally, after something like 6 cancelled appointments, he said to bring her in anyhow b/c I was at my breaking point w/the constant yowling. So I can sympathize, trust me. I'm sure all will go well for Polly, too, and this will all be a memory.