Is it normal to not feel nausea everyday?

Some days it's so bad I can't even function or get out of bed but other days it's just an upsetting stomach feeling and if I wait to eat I start getting nauseated but the other part is that I just can't eat anything.. Nothing seems enticing everything is gross but I've only thrown up once when I ate spicy kfc chicken.. Ughhhh.. Will I ever love food again.. Is this normal.. I thought morning sickness was you eat through up and the feeling goes away.. I don't know what to feel anymore...