Was it really that easy?

So I am 8w1d and have had such bad morning sickness for weeks. This is my second pregnancy. With my first I took my prenatal at night as I was going to bed and I never had morning sickness. This pregnancy I have been taking it in the morning with my breakfast and have been so sick. I finally decided I would try switching to nights and see if it helped at all and my morning sickness is basically gone. Can something so simple really make such a huge difference?