Is it all in my head?

Okay, I am 7 DPO... for the last 3 days my boobs literally feel like they’re going to fall off my body. I’ve been pretty tired since last Thursday but I always feel tired after work cause my job is just mentally draining. I feel like I’ve been in a fog all morning. I don’t wanna test for two reasons 1. Because i feel like it’s too soon and 2. I dont wanna face ANOTHER negative.

I’m in a long distance relationship so tracking my conception date is relatively easy and it would only be a little after a week since II’ve seen him. Am I crazy? Is this in my head cause I want to be pregnant?