I think it's normal. I've been bouncing back and forth. Lost symptoms at 8+5 for a few days and they seem to be back now. It can be scary, but definitely seems normal, especially from what I've been reading around here with the back and forth with symptoms/no symptoms from others as well.
I will say, however, that I always say if you're really worried, it's worth a phone call to your dr/midwife. Not necessarily because something is wrong, but for your reassurance. It's better than sitting around until your next appointment (especially if it's weeks away) worrying yourself. Sometimes they'll tell you over the phone that what you're experiencing is normal while other times they may have you go in.