What Causes Discharge Of Whitish Liquid From Penis?

I'm a male of age 19 and my private has just in the past few days started secreting a white-ish to yellow-ish liquid sometimes.There isn't any severe itching, and it only slightly burns when urinating. But everywhere I go online looking at these symptoms it says STD, I was checked for STD 5 months ago and have not been sexual active for 8 months, even then, I have not actually ever had Intercourse. I'm started to get worried and don't know what to do. I'm scared that I may have to get blood taken, and that's an extreme phobia of mind which induces panick attacks.The liquid is similar to that of when I got my ears pierced and they were infected.