Don't want to get my hopes up.

So today I took a test and got a Faint positive. I want to be excited, but I don't want to get too excited yet. Nervous it may just be a chemical pregnancy. I'm 2 days late for AF, minor breast tenderness, heartburn, and headaches, increased appetite, and joint pain. AF is not normal so I may not be late but according to glow I am. I just don't know what to think. Any advice??