My voice changed in kinda a weird way...?

Hello. After the voice change it is common for boys to get a bit lost in their singing voices, especially if they have sung before in another register. What happens is: before your voice changed you probably used your head resonance to sing as a soprano. Now that you are a tenor, you only have your chest resonance. You will have to get used to developing a bigger air support. I think with vocal technique this can improve and if it doesn't, you should maybe try and have your vocal chords checked by an expert doctor to see if there was any problem that occurred during or after your voice changed. I wish you all the best