Throat/Singing, helpppp??? :/?

I have suffered with two really bad sore throats, both were for about two/three months. I’m a lot, lot better than it was but it’s still fells a bit sore and my voice doesn’t seem to be what it was before the first time, especially my vocal range, I could go really high but I can’t seem to do it anymore. Please if you have anyyyyy advice that could help me I would be sooo grateful