After my marriage , I moved to USA on H4 VISA in Feb 2014 -Valid from (Jan 2014- Nov 2016) .My husband is on H1 and his I-140 is approved. I started studying in a State university from Fall 2014 and traveled to my home country,appeared at a Consulate for interview and converted my visa status to F1 in Jan 2015 .I then re-entered US on F1 visa. I have two valid visas stamped on my passport H4 AND F1 currently . I want to take advantage of H4 EAD rule and convert my status to H4 again. To convert to H4 , Can I travel to Mexico for 3-4 days and re-enter on H4 visa status with the stamp which is already there on my passport and without going for any interview or making any COS application?