Can I travel on H4 when H1 is picked in lottery?

Hi All,My wife is working in US and I am having a valid H4 visa, but currently I am in India. I filed H1 petition from a consultancy from US and it got picked in lottery.Now my question are,

Can I still travel to US on H4 visa to US? If yes, then till when I can travel? I heard that once my H1B petition is approved (in July end or in Aug) then I can not travel on H4.Is the stamping for H1B needs to be done from India only.Please help me here.Thanks in advance.

Is that OK to Travel on H4 when my name is Picked up in Lottery this year?

Yes, it is ok to travel on H-4 while your H-1 is being processed.