pregnancy tmi

So af was due yesterday (cycle day 31) and it didn't turn up I had constipation backache that's it. 
Then this morning (cycle day 32) still no af my stomach has been doing really load rumbles had loose stools (sorry tmi) and backache still here. and again tmi I have watery/shinny cm anybody else have this with a BFP? I don't want to test till atleast a week late for af any help/experience would be appreciated