Yes it is probable 'limp mode' but a '13 is past the warranty. (5 years, 60,000 miles).
Which leaves you with a trans problem. I suggest you start checking prices for a trans from salvage yards....and install prices if you not real good with auto work. Most of the auto parts stores do have exchange setups with rebuilders. Remember the trans probably needs to be the same year as yours as they made changes almost every year.