First of all, can you think of anyone who would actually do that to him, and what would they even gain from hacking his accounts? That’s why I don’t really think it’s a hack—there’s a high chance that it really is him. It may just be that he’s becoming desperate, which is why he’s even swearing on his late mother and your unborn child to convince you.
My advice is to stay calm for now, especially since you’re pregnant and you’ve only recently gotten married. Try to analyze things carefully and understand where this problem might be coming from and why he is behaving this way. Once you’ve thought it through clearly, then you can try to resolve it properly.
