Wow, so new and oh so rude! That title showed lack of maturity, something that is needed in huge amounts when thinking about breeding.
If you purchased 2 Chi's for breeding and were aware that 8 months was too young to breed, why the heck leave them together?
If you want to breed do some more research, so you know when ideal breeding age is, how long is a gestation period, the possible consequences of breeding etc.
Its not just put them together then 2 months later you have puppies! Its much more than that, and alot of times chi's become agressive and reject their puppies.
Your young mom is very likely to do just that. Good luck with them and all I can say is I hope she doesnt die on you just because you were irresponsible enough to want them to breed