I'm sorry I have trouble reading your post cause I'm lazy. But can you clarify about your family support? Do you have any from your side? Anyways I'm an alcoholic. I want to warn you the potential for him to be a supportive and caring partner is going to be very small at this time.
Do you have insurance? If so, there are often pregnancy support groups that are offered.
I do not think you are crazy. You are looking out for yourself and your children.