a couple of weeks ago I found a female pregnant cat(stomact like she ate a basekeball).I tried my best to find her owners but no luck..my problem is,I am afraid she is overdue but I can't really tell and I can't afford to take her to the vet at this time...her stomack is really hard and she don't seem to be nesting and she is still eating like normal...I don't know what to do....can anyone help?