your pregnant so your emotions are all over the place. you should talk to your doctor the next time you get a check up.
dont feel jealous of the relationship he has with his son. though i hope there is 'no drama with his baby momma' this is your husband and you are blessed to have someone who is wonderful.
you can to take deep breaths when you get upset, and take a moment to think b/c of your hormones.
your causing stress in your marriage, and this is not good. you maybe hurting your husband for no reason at all. he may not understand why. it's the opposite effect of a women being verbally abuse by her husband.
enjoy your wonderful life with your husband.
good luck
and early congrats on your baby.