I don't understand.. 😞

Terena Kaye💜👌✌
Me and my husband have been ttc for 18 months now. 
I was on the depo shot for more or less than a year. 
Is there something else wrong? Should I go see a doctor? 😔
It's really beginning to bother me. There's nothing else I want in this world more than a baby.. 😥