Odd AF

Vicky • Trying for baby no.1. We got married in March 2014 and live in Alford Scotland
Hi ladies, what are your thoughts? AF showed up day 31, not that unusual my cycle has still not settled down after coming off BC. My AF lasted two days and was light. Not normal for me - medium to  normally 5 days. Did a HPT day before AF started- BFN.  Am I just being hopefully, could I still be pregnant?