Bad timing

Kris🐶🐶👶🏼
This is long and i really wasnt sure where to put it...
So my husbands dad has almost terminal cancer, and he found out right after we found out we are pregnant. 
Of course im very sad and angry about this and i feel sooo bad for my husband bc tey are very close, but could it be a worst time for this to happen? 
This is supposed to be our happy time, and i dont want to sound selfish or insensitive but this is supposed to be my time. And my husband is obviously upset about his dad and he takes it out on me. Everything makes him mad and he cant concentrate on anything. He just backed up into my car a few mins ago and left a huge dent and i cant get mad and yell at him. 
And earliar he actually said its not fair that his dad has cancer and he tried to take care of himself his hole life besides drinking alot, and my dad smokes 2 packs a day and is 200 pounds overweight and doesnt have cancer. For starters my dad doesnt exactly live a great life. The man cant breath and he can barely walk. Oh yea lucky him. And that is such an asshole thing o say. So you would rather my dad have cancer?? 
Im sure he didnt even think about when it came out of his mouth but still. That was a horrible thing to say.
And he just gets mad about every little thing. He couldnt find his boots earliar. I didnt touch his boots but he couldnt find them so he started yelling and slamming stuff around. 
And he keeps saying his life is so bad that he just wants to kill himself. That hirts me so bad. I understand that hes hurting but that is a hole nother level of hurting. Like he doesnt even care about this child that he helped to create. I dont think that e would ever hurt himself but some of the things he says sometimes are just terrible. 
And with his dad beig ill i have to plan all of drs appointments not only aroud my schedule and my hasbands schedule but around his dads dr appointments to and tht gets difficult. I know its not the mans fault and he doesnt have any family besides his 2 sons but this is just hard on me to. And i dont even know wht to say to my husband. Am i supposed to tell him it will be alright? Idk if it will be. He hasn even started treatment yet. He was supposed go oct 1 and his drs dad just died so now my fil appt is being pushed back bc no one wants to deal with cancer that he has. He waited an entire moth for his appt and now 3 days befor they cancelled on him. 
My husband cant get excited for anything bc all he can think about is his dad dieing.  This just sucks so bad. Not that it would be better if i want pregnant. 
Why do people have to get sick. This just sucks. 
Sorry this was so long i just had to get i out. I dont have friends to confide in.