Struggling in 2nd Trimester

I'm a first time mom and currently in my second trimester, I have lots of nausea and vomiting, I have very low energy, and get very light headed and need to sit because it feels like I may pass out. My mood hasn't been very positive either.

My doctor has prescribed me nausea medication, indigestion, calcium, and iron because my iron is little to none. The calcium pills make me teel sick. Can you guys give me any recommendations on medicine, food, lifestyle and anything else that might be able to help me and keep my energy up along with my mood or alternatives to some of the medicine l've taken.

I'm up for anything whether it be natural, holistic, home tips and tricks etc, thank you!