Bump?!!!!?!!

I was looking at y downstairs area and noticed something that I haven't noticed before. On my clit (only whenever I spread my lips) there is a small red bump. it's not irritated, it doesn't bother me at all actually. I'm just concerned as to what it might be? I don't believe that it's an STI, but it does concern me. I'm supposed to be making an appointment for a gyno fairly soon, but due to financial issues it may not be happening as soon as I'd like it to. PLEASE help :)