Pregnant with the wrong man

Pregnant with twins - I have a 16 month old from previous relationship - now that I'm pregnant , unfortunately , my boyfriend is really showing me he can't handle it --- he treating me bad and I shouldn't be with him. I can't do it alone , I can't fathom getting an abortion, so ...what should I do ?! There are serious health risks to me and the babies - I have one ovary and lots of issues with my organs , I should "" have died last time. Advice please