When is the earliest you can test

Tamika • Through Christ ✝️ all things are possible!

So I’m 10dpo and I had my IUI on the 5th of January. I’m so nervous that it may not have worked😞. I know I’m not supposed to test until January 19th but I couldn’t help it. I started to test 7dpo and I’ve gotten negative pregnancy tests the past four days. I thought this two week wait would be so easy but it’s killing me.