Is it to early to test?

I'm currently 3 weeks 4 days. Af is due in 4 days and I'm 8-9 DPO I tested the past 3 days because I'm anxious. All BFN could I be just too early to tell? I've gotten sick the past 2 mornings (throwing up) but only in the am. Sometimes I'm nauseous throughout the day but mostly in the am when I first wake up. I've been super hungry and craving chocolate. Normally by now I would be breaking out and having other symptoms AF is coming but I have none of those. This feels soooo different. I need to find out by Friday if I'm pregnant or not because I get to injections a month and they are due Friday and Monday and can be very harmful to baby if I am Pregnant. AF isn't due till Saturday. So I don't know if I should just wait till Friday morning to test again or if I should test again before then. I am going to the dr. Today to explain my symptoms and see what they say but I wanted others opinions as well. Hoping for a BFP soon.