Applied for I-485, Can I travel?

[BSQ9999]

I am on H1 visa currently which is valid until 09/30/2015. I haven't got my passport stamped yet. My wife is US Citizen. I have applied for family based GC. I submitted application forms (I-485, I-130, I-765, I-693) to USCIS on 02/28/2015.

I need to travel to my home country on 04/15/2015. Can I apply Travel document and travel to my home country and come back or do I have to go for H1 stamping?