Never cramped this bad

Daija
Today I am 13dpo, took a test yesterday morning and got a vvvvfl according to me & my hubby! (He swears his vision is perfect) today I've been experiencing very sharp cramps definitely leading to lower back and upper butt pain! Not even on my periods do I ever cramp like this. Mind you AF isn't due until 2/23, should I wait to test again then or should I again tomorrow or Monday morning? My legs are in pain, boobs are sore, and I've been sneezing today (besides the cramping and pains!)