H1B Visa stamping

[Bolzano]

Hi all,

My H1B visa is about to expire in a few weeks. The petition is valid for about a year.
I was thinking of going to Mexico or Canada to do the renewal
I wanted to know what your experience are.

* if i leave the US, will i have any problems at the port entry if i have a week left before my H1B expires
* how long does it take to get a Canadian visa
* will the Canadian consulate in the US grant me a visa even if my H1B is about to expire?

for mexico
* i was thinking of going to Matamoros
* anyone ever used the services of Mr. Salvador? any comments?

Please this is urgent, please let me know if you can share any thing about these few questions

Thanks

[Bolzano]

Please do anyone have any insights or comments please?
especially for Mexico
this is urgent

thanks guys

[rockingatul]

Question on DS-160

I did my bachelor in computer science India and worked for 3 years in Company X and I came to the USA to study Music production in 2012, after studying music production, I got my OPT for 12 months. During that OPT I actually worked on two jobs First at company Y, As a Recording Engineer(Unpaid, related to my music degree) and Second as (paid, part-time contract unrelated to my music degree) Software Engineer at Company Z, however in SEVIS record I only reported Y. Later I got into company W as database engineer and before my OPT get expired I got enrolled into master program in May 2014 and got the CPT to start to continue working with company W and Later joined U, who filed for my H1b and now I’ve H1B with company U and I’m going to H1B Stamping in India.

DS - 160 asks for previous 5 years of work history and also only three work info can be filled online and for the rest of them I need to carry just the documents.
What job information I should mentioned avoiding any extra questions. I know I should not have worked on the IT field when I had the degree in Music field in the USA, though I had the bachelor in computer science. What steps should be taken to avoid any issue with stamping?