I'm wearing myself out.

I know your supposed to sleep when baby sleeps but I just can't seem to and I'm very depressed.any ways to help me sleep? My mind is racing and full of thoughts and anxiety and that's why I can't sleep for the most part.I live with my mom(I'm under age so please don't tell me to just grow up also my boyfriend (ex) left me so that just makes me not feel good enough and I don't have no help from him.My mom helps occasionally but I don't let her often because she needs sleep so sometimes I'm going without 24 hours of sleep or more and I feel terrible and very very depressed.I'm just worried about everything.My appetite has dwindled down to barely anything and I'm breastfeeding which worries me I'm still taking my prenatal.so any advice.