Fertility specialists v/s Gynaecologists

Morning ladies..hope u had a gud weekend..
I'm recovering from my mc but now I'd like to see someone to run tests on the cause of my miscarrages..
I'd like to know a few things about the fertility specialist n the gynae...
1.which is best,especialy for someone with a history of miscarrages
2.The difference between how both work
3.A good fertility specialist in the westrand area(Krugersdorp,Randfontein etc.)
4.Any info abt the 2...