I need advice

So I am 11dpo and I had spotting a little on Monday and a little yesterday. I took a FR pregnancy test today and it was neg (go firgure) but I've got this metallic taste in my mouth which I've read is a early sign I've pregnancy. all I've had to drink is water I'm not taking/eating anything different out of the norm, I've never ever had this taste in my mouth before. so what I'm asking is when should I re test. I took the test later afternoon so may be I should test tomorrow morning? or should I just wait to see if I get AF on Saturday.