Throwing up but not really??

6 weeks and five days and I find myself nauseous in the mornings and once I even threw up but lately just nausea and sometimes going thru the motions of throwing up but nothing comes up. Is that normal? Then after i'll have to go to the bathroom for a BM...is this normal?

All my healthy pregnancies I was vomiting every morning and when I miscarried I committed only once so I'm very nervous.

Thanks!