is my natural discharge when turned on normal?

I'm 20, a virgin and completely inexperienced in that area but when I'm feeling... libidinous, I've noticed that the natural lubrication is either clear, slippery and stringy or a thick white and chunky. I mean, big chunks sometimes other times not so much and I know that the texture of it changes throughout the month but they seem to coexist, basically it just depends on the day. I find it rather repulsive and am worried about it for if I do become sexually active. Is this normal or should I see a doctor?