Re-entered From Mexico via land NO I-94 given

[susage]

Hi,
Please help me, I have a urgentyet wierd problem.
I Re-entered From Mexico via land via car. I was on visa in US but re-entered on B1 when I returned from Mexico. Basically it was an exit and entry to change my visa type.
But at the POE the official didn't stamp my passport and my I-94 is not generated on checking Online.
I read somewhere that on entry by land a paper I-94 is given,but I wasn't given anything.
Can you please tell me how I retrieve the latest I-94 reflecting this latest entry.
I don't even know until when my departure date in U.S. is?
Also, I need to submit this to my employer. Awaiting your response.

[newacct]

It could be that you were admitted through Automatic Revalidation, which means you were admitted on the same status you were previously on, under the same I-94 and duration of stay as previously.

[susage]

Thanks for your response.
I wasn't aware that I need to ask for a I-94 and pay any fee. I showed my B1 visa the officer asked me a couple of questions and that was it. Later on checking I saw that there was no stamp on my passport.
1. Can you please tell me what would be my current visa now B1 or the previous one.
2. If I need a new I-94 would I need to re-enter again.
3.Is there a way to get my current visa status and departure date given by the officer.

Kindly advice.