Confused!

Emma

Hi all. I'm 29 and came off the birth control pill one month ago and started TTC baby no. 1. I had been on the pill for 3 and a half years, but before that had been on it on and off since 16. AF generally always arrived a couple of days early when off the pill, very rarely late. I'm now CD 34, have been having intermittent abdominal cramps (mild) and occasional nausea for about a week, but had BFN yesterday morning with FMU. Yesterday evening when I wiped there was some light pink marks on the toilet paper so I thought AF was here, but since then just very small amount of light brown discharge and nothing since this morning. I'm so confused ladies, is this just a process from coming off the pill and just a sign that AF is coming? I've never experienced it like this before though... could it be a sign of pregnancy, or something I should be worrying about?