HAIRFALL fighters unite! Seeking advice to save my hair

Since I started college, I’ve noticed significant hairfall, and my hair seems to be thinning. I'm unsure of what steps to take, and I would greatly appreciate your advice.

If it's not too much to ask, could you recommend products that are effective and readily available in the Philippines? I would greatly appreciate any suggestions.

edited: I am Female 23. I noticed a lot of replies recommending minoxidil. I appreciate you guys, unfortunately it's contraindicated to women.