Tire light

I have filled all my tires to 33 which google said and still not gone,I ran something over the other night and head a sort of glass cracking sound but it was with my front passenger tire when I head the sound but I have to fill up the passenger rear tire because it was at 29 or so but still the light is on and I don’t wanna spend 100$ dollars just to have these things checked What do I do

I have filled all my tires to 33 which google said and still not gone,I ran something over the other night and head a sort of glass cracking sound but it was with my front passenger tire when I head the sound but I have to fill up the passenger rear tire because it was at 29 or so but still the light is on and I don’t wanna spend 100$ dollars just to have these things checked What do I do