Cuerpo Amarillo Injections?

Bren
Hello, i was wondering if anyone on here has taken the cuerpo amarillo shots And had them work for You? The lady who put them on me did them at the beginning of my lást period And she said i would start again after 15 days, or that if I got pregnant I wouldn't anymore. And I didn't start. I'm due for AF this Saturday 4/12 and I took a test on Monday 4/7 and I got a BFN:( 
​I had a miscarriage in December of 2013. I miscarried twins at week 21, and I've been trying to conceive ever since. Has anyone had any luck with these? If so after how long? Any comments would help thank you.