Trainerunlimited, I tend you think you are probably young. I tend to think, by the way you have spoken of a few things here, that you decided to become a breeder, without knowing the first thing about it, or what it might entail. You say you have a 'set' of puppies. The word is 'litter'. You say you are maybe just going to purchase another bitch to breed. This screams of a BYB in the making, to me. Sorry, but it really does appear that way to me. There are millions of BYBs out there, all doing just as you have done and are apparently, considering doing again.
I can see you really love your dog/s. Remember though, about 99% of dogs today, are not of breeding quality. What made you decide to breed in the first place? How much homework did you do, regarding your breed and whelping a litter etc? How did you decide upon the stud to use on your bitch? What testing did you do before breeding? I think you admitted, you knew nothing about testing for the genetic problems known within your breed. You also placed your puppies in new homes, way before you should have.
I'm sorry if this appears harsh, but it is no doubt, something many have thought here. Many of us, have to rescue/clean up, the mistakes made by breeders who decide to breed without knowing anything about it. They sell their puppies cheaply, to the first buyers who come along (also looking for a cheap pup) and then often, decide to breed again.
Where did you get your bitch? Not from a really responsible breeder, I'll bet. He or she, should have thoroughly informed you about the breed. Their breeding dogs should have been tested. They probably should have also had shown or put their dogs to some working titles. They should have known you were a newcomer to the breed and mentored you. If not, then they again, might have been the typical BYB.
Spend the next years enjoying your dogs. Learn about the breed. Learn about the bloodlines in the breed. Show your dogs. Put some working titles on them. Thoroughly evaluate your dogs, as to their faults. Decide and only after a year at least
of solid homework, if you have what it takes, to be a responsible breeder. Any idiot can breed two dogs with working reproductive organs. It takes time, homework and a solid knowledge to become a truly responsible breeder. Even then, as the years go on, responsible breeders are always learning, always evaluating and knowing that they are the link in the chain, of the next generations of their breed.
By what I have read here, you seem to be very open to learning. For that, I am really encouraged, that one day, you might become a breeder of note in your breed. Take a step back and don't think of breeding right now or for a long time. Listen to that which others have suggested here. Educate yourself for the next few years. If you truly love your breed, as I think you do, one day you might be here giving other newcomers advice.