advice needed!

Is there a difference between fertility specialist & gynaecologist. I am consulting a gynae, but she does not appear serious. She does not understand how badly I want to get pregnant. All she told me was to try for another three months & come back if you don't get pregnant. I am 28 years old. Got pregnant in Jan 2015 but miscarried in March 2015. She said since you got pregnant once , you will get again. It's been almost a year now😢