So I'm not quite sure that I am prego but I've been experiencing some symptoms like morning…

So I'm not quite sure that I am prego but I've been experiencing some symptoms like morning sickness, clear watery along with a clear mucus discharge, lower back pain, along with mild cramping, Also I'm having flu like symptoms and I have no energy, I really don't have an appetite, and I'm 8 days late for my menstrual cycle. I have taken a test all have came back negative. I would only be about 2 - 3 weeks I don't know if it's too soon for all this to be happening. Starting to feel crazy.