2 weeks ago I took in an unspayed female around 9 months old. The neighbors left her when they moved. I do have an appointment set up for her to be spayed but not until the 25th of May ( when I have the money). Today she slipped out the door and was running around outside chasing bugs. I tried to get her in the house for over an hour but I couldn't do it. I had to leave to pick kids up from school and was gone for about 45 mins. When I came home she was under a trailer and she came right to me. She came in the house and played down on her side and thumped her tail on the floor..very relaxed. The last few days she has been so lovable and when I pet her the tail goes to tje side and the butt is in the air. I think sje may be in heat?? Even though I haven't seen any other cats around for a few weeks could it be possible that she mated while I was gone? Her behaviour changed quite a bit in the time I was gone. Would I notice any physical signs if she had mated? Thanks for any advice