Help!

So, today I am 14dpo Af was suppose to show yesterday and so far nothing. I took a pregnancy test today and I got the faintest line and of course I'm excited but not too excited because I've been feeling cramps all week long thinking I'm out this month. Now I get to work today and when I wipe after going to the bathroom I see pink discharge!!! Is this normal? Has this happened to anyone else and AF didn't show? I'm just trying to keep positive but realistic.