High soft cervix for the past 3 cycles?!

My cervix has been high and soft for the past 3 cycles. And when AF comes it gets really high and open. (TMI but i can stick my pointer finger in my cervix a little past the first joint(that just happened this time around)) my last 3 periods have been really not normal for me ethier. They have had very watery blood without any clots. This period that just started yesterday was so brown I literally thought i had poop stains on my panties. (Lol) it just turned to that very watery blood this morning. I normaly dont get period pains ether. But my lower back hurts and I have like cramps in my cervix (if that makes any sense) I have googled this and havnt found anything that really answers my question...HELP!