Everything you are describing sounds normal, as all of the girls have said... All pregnancies vary. I'm almost 24 weeks, I STILL get morning/all day sickness, I still am exhausted daily, and thats from doing very little. And I also went thru a time, right around 18-19 weeks, where I stopped feeling her at all. (even tho before were mostly just little flutters and a few little kicks) I got so nervous. For days until I had a doctors appt, I was so worried that something happened to her, that as soon as we saw our nurse and heard the heartbeat I just started crying out of relief. Try and relax, and enjoy your pregnancy. If you can, rent a doppler online, so you can hear your little ones heartbeat anytime you need reassurance.

Hope it gets better!