My income this year is unexpectedly going to be WELL below the federal poverty line. Will I owe the entire PTC back for my marketplace plan upon tax season next year??

I’m a student. I’m in Florida (a state I read that did not expand Medicaid—if that matters in this case).
When signing up for 2023, I estimated I was going to make $19,000. School got way too hard, so in order to focus and make good grades, I had to leave my job halfway through the year. It looks like my income will only be about $10,000 this year.
This puts me well below the federal poverty line which would have excluded me from receiving the PTC in the first place if I had been accurate with my estimated earnings. Does this mean that come tax season, I’m going to have to pay back the entire monthly tax credit I was given for health insurance? This would be thousands of dollars that I don’t have, and I’m losing sleep over the thought of it.
I’m super anxious about this. Should I be ok, or should I do something extreme like sell a bunch of stock I’ve bought over the years and hope that the gains can count as income to get me over federal poverty the line? Should I do something like fill out a form C and make-up a bunch of cash payments I got for odd jobs so that would count as income to push me above the line?
I’ve read a few similar situations like this on Reddit, but I could never get a clear picture or find out what the posters’ results were. I really appreciate any guidance.