You sound like you are reaching out to your supports which I give you lot's of kuddos for. Between your natural supports and your Dr / Therapist there should be a way to avoid being hospitalized. PLEASE talk to your Dr / Therapist. If your issues are left untreated / hidden bad things can happen.
As a social worker I've seen it As a mom with two children and a mental health dx I can tell you this, I can relate on so many levels. You sound like you have ton's of supports and options.... Long term getting help will be the best thing you can do for you and your family. If you don't get help from DR / Therapist please have some one come and help you with the baby when your husband isn't home. That person can help support you and give you a heads up if something isn't right...... You are in my thoughts and prayers and I wish you luck.