Where will I end up

Hi Gnetters has anyone else had my problem. I stupidly sold my house years ago & rented on the advice of family & friends. Moved a couple of times till I found what I thought would be the last. After 8 years & spending time & money on making this my home I am told that the property is now being sold as an investment with sitting tenant! Nothing to stop someone saying that they will keep me here then either putting the rent up to an amount I cannot afford or telling me that I have to go as they want to move in themselves. I have 3 cats buried in the garden under plants that are really lovely now having been there for several years now.
I have bushes & trees brought with me through the previous moves. They are now beautiful trees in their prime which this time I cannot dig up & take with me. They will probably be cut down as most people now do not want the bother of trees. That will break my heart as will leaving my home! The most stupid thing I have done in my 73 years was selling my house! How on earth do I get through this? Any ideas would be welcome please!