Need Advice

Today I have been feeling really off. I feel like there is a rock down in my pelvis/uterus. I feel real bloated and a little constipated. I have had mild cramps on and off all day. If I taught straight up, like in a chair at a table, my lower abdomen feels real uncomfortable. Feels like I could start my period, but that's not due until June 22nd. I've been having trouble sleeping lately and have been plagued by weird dreams. Anyone have any advice about what this could be?