What should I do?????

So AF is due today. I'm at work constantly running to the bathroom because I have discharge that makes me feel as though my period has started. Ughhhh, I hate this. I'm so scared to test because every time I go to purchase a test my cycle comes on right after I leave the store. Or it seems like my cycle doesn't start until I go and purchase my pads then I'll start that night or the next day. So I haven't bought pads yet and I haven't bought a test yet. I'm just waiting it out. Maybe the b***h won't show up. Let's hope for that. What should I do? Should I continue to wait? If so when should I test? I am hoping I'm pregnant because I plan on keeping it a secret from my husband until Fathers Day along with gifts.