Exhausted out of nowhere?

Im 33 wks pregnantand rhis is my 4th baby ive had some issues on and off and the last 3 days ive had diahrrea, lost pieces of my mucus plus not bloody just pieces and have had constant braxton hicks more than ive ever had, with my last son i didnt know i was in labor til an hour befofe giving birth, my first contraction i ever felt i was already at pushing point and it made me drop and push so im concerned that will happen this time. I had hik at 37 wks+1day. Im 33 wks now and this girl to my knowledgeis still in breech positionbut 3 days ago i was 1 cm dilated which i lnow you can sit at but is abnormal for me. My first i never dilated had a c section. Second resulted in a c section but as soon as i started to dilate it took me maybe a week to dilate from a 1 to a 10 and he just got stuck. Third i was checked 4 days prior to give birth and wasnt dilated at all just thinned so i dilated quick. Im overly exhausted out of nowhere with this one which ive never dealt with. Ive had normal energy and all of a sudden im so tried ive had to nap most of the day. Is that normal randomlyat 33 wks?