I woke up with a horse voice no fever no sore throat air went out in the house had to use big fans to be able to sleep. I also got into a cold pool at like 12 last night and woke up at 4 am coughing what could this be should I be worried?

Common cold. Check your temperature and flood your body with fluids, steam shower, tea and dark brown honey, and consult your PCP.
Horse voice. Exposure to water, up late and running a fan. All can be things that irritate your vocal chords. Drink fluids and be careful with your voice for a few days (no yelling). This should recover in a day or so. Now if you would develop a fever, worsening symptoms with rest or stridor get checked.