There are a lot of options for hereditary hair loss. Before that, get a good wellness check to see if you are in the pink of health and not suffering from any nutritional deficiencies which are quite relevant. Next, maintain good diet, personal products that are sulphate free and paraben free, try oral Biotin based supplements for some months continuously, protein based hair serums. Else get evaluated with a doctor before seeking help for drug therapy. Topical Minoxidil and oral finasteride are available options but you will need to be clinical consulted for the best results and the correct prescription.
It's very unfortunate that you are facing this problem...it can be androgenic alopecia which is due to excess of male hormones...or telogen effluem...try to have healthy diet at regular intervals,drink more water,manage stressful situations smoothly if possible avoid them,biotin supplements helps you...you will require topical agents like minoxidil which will maintain hair density and also helps in new hair growth...consult dermatologist they will do the needful..