No AF, Lots of BFN

Mary
Hi, I am a newbie to this and need some help. My husband (28) and I (26) are trying to conceive so I can off my pill (Yasmin) at the end of march. My first cycle was 44 days, I am currently on day 56 with no AF in sight but when I take a test it's a BFN. It is stressing me out! I have had symptoms that could be both - sore breasts, slight cramps, emotional, dizziness, etc. How long do I wait before taking another test or going to the doctors?