Singing range is tiny?

G

So I’m a female and my talking/most comfortable singing note sits at around F3/G3.

My chest range is from D3 to D4 and my voice breaks at F4. If I absolutely strain I can make A#4 but my voice eventually breaks off. My voice already goes raspy at F4 if I push.

I did 4 years of classical singing lessons so I do know the correct breathing technique and all. I used to sing scales from C3 up to D5 in chest. But it’s like that’s just all gone.

My head voice can range from D5/E5. But has genuinely 0 power to it anymore.

How can I get the old range back? Is there anything I can try?