Help, horrible moods

I’m excited to have a baby, I’ve ALWAYS wanted to be a mother. But since I’ve been pregnant, I’m angry, upset, irritated, and down right pissed about 85% of the time. I was seeing a psychiatrist before I was pregnant, and was on meds, which I can’t be on anymore. So what else can I do, or what can I take over the counter that would help with moods and not harm the little one. This pregnancy so far has had me miserable, and it’s only the beginning. Please help, I’m going to lose it