H1B transfer wihout travelling to USA

HI ,

i have got H1B in 2017 lottery. my employer was not ready send me because of lack of opportunities.

I have below doubts.

1.)My husband is working in US through H1b, so I am planning to go US by H4 VISA. If i travel through H4, do i loose my H1B.

2.)Can i do amendment before traveling to US by another consultancy.

Thanks in Advance.