I don't have any answers for it. Ten years back my husband and I had a male pitbull that was the same way. He would cry like someone was physically torturing him. Would be sure to make a mess once we left him even if it were for five minutes (mind you we always spent a ton of time with him and walked him before we had to go anywhere). Was very destructive as well. I too was pregnant and dealing with what you were dealing with now. I eventually had to rehome him because the landlord wasn't happy with the noises, I couldn't deal with the damage and the unsanitary conditions. I did rehome him to a good friend that had a farm and it seemed to work out better for him. He had a ton of land to keep himself busy on and animals to constantly keep him company.
Good luck!!! It's really hard to deal with.
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