i don't really understand exactly what you are describing.. but i have little bumps on my inner labia too.. they are almost patterned the are not right on the inside, but as the skin goes out.. i don't think it's anything, cause the gyno never says, i have never really asked.. and my bf looks at it all the time and i think he would say something, cause he as seen a lot of other labia.
nothing to worry about.. unless they are blistery and itchy.. but i doubt they are like that if you have had no sexual contact. no worries!