I'd really recommend that you need to speak to your husband. Ask him as someone who loves you and knows you what he recommends. He is probably just as scared as you are.
He also is (Presumably) not a doctor, so allowing yourself to go inpatient may well be the most responsible decision you can make now, as it ensure that neither you, nor your husband need to be in control - the hospital is.
I'm sure they'll be able to give you meds to deal with these terrible physical feelings right now - they are the only ones that can offer you the relief you are look for right now.