6-7 dpo symptoms? Could it be?!?

Im 6-7 dpo according to the opk. This is my 2nd cycle off of the pill. Since 4 dpo I have been extremely dizzy and light headed. I'm pretty healthy and its not blood sugar or anything. Since yesterday I have had MAJOR cramps in my lower pelvic region worse than af!Now they have subsided to just agonizing cramps. Also have had an increase in watery cm. My lower back feels heavy. Since yesterday am I have been on and off nauseated.I am a very active person but since yesterday I cant seem to wake up. Im not tired like sleepy, I just feel in a fog like I just want to sit on the couch all day and veg out! My boobs are sore, but that's normal for post O for me! But this is different. Like from my underarms to my nipples. The rest of this is totally out of the ordinary though.My legs have been cramping up bad this am as well. I also had a very vivid dream last night about having to deliver my own baby? Very weird and alarming lol Any help would be great!