Talk to Gynecologist on Pregnancy Related Query- Important

Dear Doc, i am suffering from pregnancy depression. I am 25+ weeks pregnant. I got emotional over minor things. As i have conceived late so everytime i am thinking only that my baby will remain safe. We live separately and i almost daily ended up fighting with my husband. He is short tempered as well. I am too emotional, i started crying over these things. As i am allergic asthematic but i am having daily attack of nasal congestion. Please advise what should i do to avoid these unnecessary fights and to avoid the nasal congestion.