No period

So I’m 5 days late for my period. I have taken a few tests but they must of been indents because they don’t seem to be getting darker. Again one this morning very faint line but no darker then the one a couple of days ago. Yesterday I thought I was coming on because I have the faintest bit of blood in my CM but nothing. The only reason I could think of for a faint rest this morning was I was seeing loads last night and only held it for 4 hours. Any thoughts?