I'm 11 days late

I'm 11 days late and I got a faint one that could have been a indent cause I didn't see no color then a neg one this morning. I need answers???? has anyone ever been this late and got a neg then got a positive later on I'm not stressed or anything my life is good right now. I had lower back pain on one side last week also alot of discharge that not white at all just clear as if I would have peed on myself a little. And alot headaches and being tired.