Too early?

I have been sick the past 5 days, idk if it's a virus or morning sickness? Sore boobs, tired & wide awake at the wrong time, cramps, nauesa, MOOD SWINGS, etc. I took a test yesterday and was negative. Can you still have pregnancy symptoms before it's too early to tell for sure? My period is due in a week. We've been ttc for 6 months now.  My first pregnancy I was not sick at all!