Sooo confused... Help!!!

Katie • Trying for baby #1!! Hubs has a child from previous marriage that I love to death
I am 16 days late.. Still getting BFN's.. I stopped taking BC pills around Nov 8, had a normal cycle on Nov 15 for 5 days.. While at work today I had some cramps on my right side low and in the front, went to the restroom and when I wiped I had a very small amount of light brown discharge.. Not a dark color like I get before AF! I went to the restroom a few hours later and nothing was there that time! What is going on??? Could I just have skipped a cycle and the discharge today was my implantation bleeding! By the way if you can't tell this will be my first pregnancy and child! Please feel free to share your experience