It is indeed distressing to face hair loss at a young age. I would not rush into PRP injections as the first option since:
1. It is not legally available in Singapore
2. There is only scant evidence of its efficacy for hair loss
3. So far the scant evidence only shows results for certain types of hair loss
I would recommend seeking a full consultation with an aesthetic doctor or dermatologist with a special interest in hair, ascertain the exact reason of the hair loss, before moving on to discussing treatment options. The process often requires blood tests and a detailed consultation.
There may be more cost and time saving options, that also have more science behind them. Hope this helps!