6 DPO symptoms possible?

Courtney • Married to the love of my life and trying to conceive our one baby to complete our small yet mighty happy family. ❤️
So I'm 6 DPO and I am not feeling myself today!!
​I'm very irritable, to the point I almost want to cry, and everything seems to be annoying me. I'm also having horrible acid reflux and even threw up from it, and I never get acid reflux! I'm also cramping right behind my pelvis, feeling like I usually do when I'm about to start bleeding during my period. 
​Is this even possible that it's implantation symptoms or pregnancy symptoms?! I'm so confused!