I'm 27 years old. I gave birth to my 3rd child about 3months ago and had my first period around 2 weeks ago. It was a normal period with almost no cramps. I started my fertile window yesterday according to my periods pre pregnancy and I also started to have some dark brown discharge but very light. Today the discharge is more black than brown and starting to become heavier, but still just about a tbsp every 2 to 3 hours. I am also suffering from mild cramps. I never had any type of mid cycle bleeding. I last had unprotected sex 2 days before my fertile window using the pull out method. If it's not obvious I am trying to avoid pregnancy. Anyone had any advice?