Since I was 5 I got my tonciles removed because of toncilitus.
Now I'm 16 and I have realized that my voice has changed because of this.

After I had the sugery for my tonciles I went to speech therapy for a while afterwards when I was 5 as I wasn't speaking the same.

When I hear myself talking it sounds like I have a stuffed nose, I hate the tone my voice gets when I talk, it doesn't sound clear.

When I breathe through my nose it feels heavy, sometimes air can pass through one nostril easier than the other, but it never feels like my nose is clear. On top of that my sense on smelling doesn't feel too strong either.
My nose always looks red, would it have anything to do with this?

So can anyone help me out here? I have yet to find someone with the same problem as me.
Is there any treatment or even surgery I could get?

Thanks.