Thanks for the query. I understand your concern.
demands good nutrition, good exercises, good medication & regular pregnancy check ups, good & optimum exercises under expert guidance & a happy, positive & sound mind. Deviation of any factor directly affects fetus.
You have a psychological stress
problem, specially with a particular person. The management of such stress requires efforts from both of you.
You start with your own efforts Start doing meditation/ mind concentration regularly Take help of some Yoga
guru in your town & start practicing it. along with exercises./ few sittings of psychological counselar would help./ Try to avoid points of dispute with the person .
Take boyfriend to your doctor/ family counselor . They will explain importance of psychological stability & positivity in pregnancy. They will also advise him few methods to avoid dispute / he may be given counseling .
Thus try wholeheartedly & both of you will bypass the conflict & a happy companionship.
In case, he is not responding , you can think of avoiding him till you get delivered.