Sick at 20 weeks

Hey girls. I had some morning sickness and exhaustion from about weeks 5-13 of my pregnancy, but it’s been smooth sailing from there. Baby and I are healthy, and I’ve been very lucky. However I’m in my 20th week right now, and I just feel like crap. I’m tired, moody, nauseous and so hungry. I was feeling great, and out of nowhere I just feel yucky and very emotional- much like I felt in the earlier weeks. Is this normal? I thought the second trimester was supposed to be the honeymoon stage of pregnancy, and I just feel miserable lately. I’m not complaining; just a little worried that I felt great, and suddenly things have changed. Is baby trying to tell me something? Wondering if this is normal, and if anyone else can relate.