sorry to hear that, to grow them back you can try:
-Jamaican black castor oil: a lot of people testify that it helped them a lot whilst trying to grow back their edges/eyebrows and even eyelashes
-ordinary castor oil: considering the price of the black castor oil, it may not be affordable for some people, so ordinary castor oil may be used instead. Although.reviews of this isn’t as good as jbco, a lot of people still recommend it.
-drink enough water: 6-8 glasses a day (water hydrates the body and helps to regulate the circulatory system, which feeds the hair follicle, which then stimulates hair growth.)
-scalp massages: doing this increases blood flow to the scalp
-eating garlic and onions is another way to increase hair growth as they both contain a lot of sulphur
Personally, I like the JBCO. the smell is far from good but i really feel like it has helped in growing my hair- along with scalp massages.
A combination of all the thing mentioned above should help your hair grow faster but you need to be patient. it will take a few months.