need advice new here

I am 35 and am trying to have a baby with my bf. I already have 3 children with no problem. I have taken birth control for years and the last 2 times I stopped taking it I was pregnant by the second month. My youngest is 7 so I've been on pills for 7 years now. Well I stopped taking them and October 2nd I'm pill free. I took 3 tests and all negative. My problem is when I would normally start I didn't start. I was 4 days late and now I'm not having a normal flow. It like spotting. And you know like your last day is like dark brown well that's how it's been for three days. Only saw a darker red one day one time. I'm confused is this my cycle so should I count from when this started???