Need baby dust and advice.

So my calendar got screwd up but I marked it in my calendar that I should start ovulating 3/21 well period was suppose to start 4/8. I've had headache, fatigue, cramps, constipation, headaches, but no Breast tenderness. Well two negative test later yesterday I started bleeding pink them red now today brown all very light. I have an apt next Thursday to see Obgyn.  Could I be pregnant?  We've been trying for 8 years. So if you would mind keeping us in your prayers.