is this normal?? help pleas

I don't know how bad this will sound and I don't want any negativity please but this is my first pregnancy, I'm about 7 weeks. My first ultrasound is tomorrow. I've been nauseas badly the past few weeks and when it's particularly bad I get depressed and feel as if I don't want a baby and resent it, and think about termination and when I'm not feeling depressed I'm very optimistic about the baby and I'm positive about life. Is this normal? 😔