Hi, Im 30 years old and the upper outer part of my left breast feels very hard and has some tender hard lumps in it too. 

I called my doctor today but they told me to call back on monday as they dont have any time to see me today.

I have also noticed when I wake up in the morning my nipple is slightly inverted on my left breast too. When looking at it some white/yellow discharge came out of it as well as some clear. This has never happened to me before. When i squeezed it even more came out, maybe 2 drops of the yellow and some clear. I also notice when my nipple isnt erect there is a sort of line indentation across it which ive never noticed before either. My other nipple does not leak when squeezed and is also not inverted so i'm really scared as its all happening on my left breast. 

Theres no chance im pregnant or anything and its not my period. 

I'm just wondering if anyone else has experienced any of these symptoms before please??

I'm so scared waiting for monday as i'm pretty much convinced it is cancer because I have so many of the symptoms.

Thank you x