Opinions please... I could use your thoughts...

Desire
I have been on the patch for over 8 months and I ALWAYS get my period 3-4 days after taking it off. I took off my patch Wed the 13th meaning by Sunday the 17th or Monday the 18th at the latest.. I should have got it.. On the 17th I had brown discharge but it's gone now. 
I took a test yesterday night and this morning Friday the 22nd with the 88 cent tests from Walmart. Both BFN. I have had headaches for the last few days, cramping, slight upset stomach, and a few twinges of pain in my boobs. Any comments/suggestions/advice would be great. Thanks!!