Pressure on uterus and rectum ...could this be a very early pregnancy symptom????

It sounds nuts but the past 5 days I've had cramping and I don't know how to really describe it ...but feel like there is pressure in my uterus like I have a balloon inside of my pelvic area... And it feels like I need to go #2 which I will go hoping the feeling will pass and it doesn't go away! ...I remember this feeling with my son but I believe it had to be when I was at least 8 weeks or more ... Anyone else heard of this? ...or had this as a very early pregnancy symptom??