Diapers For My Daughter

Hi there. I'm a mom of two kids, one is 4 months the other my daughter is almost 2. Lately money has been tight for me and I ran out of diapers for my daughter. I am trying to potty train her but some days she isn't interested and some days she is. I'm so worried for her that she will develop a bad rash because were down to her last few diapers. 

I've tried so hard to ask around for help but i got no response or the diapers were to small for her. Anything can help because I'm sure not only me but a lot of other parents went through this type of situation. 

Thank you in advance.