is my husband making me miscarry?

I had my first child 7 months ago but now I'm pregnant again & I keep spotting. At first it was bright red & now it's brown but I don't remember any of this from my first pregnancy in the early stages. I did get into a heated argument w my husband all bc he said that he doesn't like the characteristic of a woman to point out something all the time. I'm like what?? All I said was this man's bumper was coming off his car! Bc I felt bad & was hoping he didn't get into an accident. I didn't laugh or make fun of him. My husband constantly nitpicks & nags abt everything fckn thing & it's just driving me nuts. & he decides to do it on the only day someone is watching our baby so we were goin to go out of town to spend time together & he ruined it when I'm the one whose working full time / over time. He's not working bc he's home w the 7 month old but cut me some slack! Some days I rather stay n work late than be w him, so I'm wondering if I'm miscarrying due to stress he's causing? Pls help bc I am scared & I don't want anything bad happening. I'm going to go get checked out but until then I am just wondering if anyone has had the spotting or knows what it could mean this second time around when it didn't happen previously.