In your situation I would massage your temples daily to be sure enough blood is reaching the surface. I would start taking DHT blockers, natural ones are fine too. Also do keep androgen levels low, refrain from all sexual activity or limit it as much as possible. Another thing I would do is start dermarolling the temples and add topicals after doing so like castor oil, peppermint oil, etc. to give nutrients to be absorbed. You don't yet have a problem but if you're noticing the temples are going back I'd act quickly! I would also suggest trying platlet rich plasma, which should work well considering your age and condition. Also try not to worry. I have this problem too but it will worsen the condition. Stay calm, eat well, exercise and get some sunlight. Make sure to get zinc, iron, B vitamins among others.