I used Aquaphor whilst I was in USA with no problems. I would def swear by that stuff for after skin care.
Take a look at the jar and if it is like most products it will be made of pretrolatum/pretroleum oil, glycerin, some form of pan or plain alcohol.
All that sort of stuff is more than safe to use. It is stuff that lightens/darkens skins has strong perfumes or causticity/clotting agents that can mess up your tattoo.
Keep it clean, let it breateh and dont pick I am sure will be fine in a week or so.
Matthew