Sorry if this is TMI!

Ok so according to glow I was due on my AF on 04/02, AF still isn't here. For the past week I have had clear wet stretchy discharge when I wipe and I don't no why? I've never had this before! I did a HPT on 07/02 and got a BFN. I also did a OPK just to see and that was negative too. Why am I getting this discharge?