Too early for symptoms and test?

Erika

Me and my guy had unprotected sex and he came in me on the 15th and the 21st. I have been feeling tired and nauseous, no sore boobs, so. a bit bloated and light needle pain in vagina on and off, no implantation blood, (yet) but I do feel like I have "something", also very mild cramping. Cramping starting yesterday, yet all the test are negative.: ( is it all in my head?