How early did you start experiencing "morning" sickness/ nausea

I'm only 6 weeks and 1 day. I know it's early but for the last two weeks I've had this nausea . I don't get sick in the mornings, or night . I get sick when someone's driving me, or sometimes when I look at my phone while someone's driving me. Does anyone else get sick like this? When did your morning sickness start ? 
My fiancé and I were intimate the other night, I spotted after and it scared me. It was very light, and sex seems to hurt me if I'm on top . I cramp a little during and a little after. Not anything horrible but definitely enough to notice . Does anyone else experience these pains ? And spotting ?