Is this early labor or normal for the few weeks leading up to labor?

So in the last week the baby has dropped, my blood pressure is up, I've had random huge bursts of energy followed by extreme exhaustion, I've noticed a change in my discharge having a bit more and smells different but not bad (no blood or extra thick etc to indicate mucus plug) and today I've had nausea all day and haven't had it like this since the first trimester. I've been fighting off vomiting all day.... I just don't feel quite... Normal I guess. I feel different but really good. I'm 37 weeks today though and as of 2 days ago my cervix is still closed. Is this normal for the few weeks leading up to labor or does this indicate labor in the next few days? Again, emphasizing that all of this has happened in the last 5 days.