I am so sorry about all this. I loss my father as well.
About a year ago I came across a yorkie female.. she was 6 months at the time. Well we got her from a friend of a friend that found her. I took her to the vet, the vet heard something from her heart.. so we did xrays. well she had a heart murmur, he said it was a serious case, from there we did the ckg... she also had an enlarged heart... He gave her 4 months to live. He said the only thing we can do at that point is to see a specialist or give her pills every day... DH and I decided we would just give her a great life until that time came. Well we had her for about 3 weeks and with loosing my Dad and all my other emotional issuse I realized I couldnt let it get to that point where I had to put her down... DH co workers took her. We told them everything what was going on so they knew. Well about 7 months later DH contacted her family and he said she was doing great! So I know miracles happen. Dont give up hope!! I would really try to see a specialist!!
It sounds like you are doing a great job dealing with all of this. I know how hard it is. I will be sending Prayers your way! Keep us posted