Looking to sell my current house in a year and purchase a larger house. Worried about a negative change in my credit score which is currently 750. I have an outstanding balance of $ 7500.00 with a fixed rate of 5.99% that will change with the new terms of service to a variable rate around 15%. If I decline the new terms of service my card is closed and I keep the low rate of 5.99% until its payed off. Should I try to find another card with a better rate to transfer my balance until its payed off? I only have one credit card.