What kind of symptoms do you get?

Lydia
For those who've already conceived, I've seen people talking about the symptoms the felt even before the test said they were pregnant.  Can you describe those?  I'm definitely an over analyzing person and whenever I feel even the slightest bit of anything I wonder if it's a symptom.
AF not due until 4/22 but I'm kinda feeling nervous.  My hubby has to move away for school for a few months.  He leaves 3 weeks from now and I pray to be pregnant by then.  I know the likelihood isn't super high but still..