11dpo and all symptoms have gone...

Hi ladies! I wondered if all ladies who have had a BFP could help with some advice for me... I am still TTC. I was having many symptoms peaking around dpo 9 and 10 (heartburn, sore breasts, indigestion, sore nipples, nausea and cramps) and waking up around 5 am to pee... I was starting to think this is my month. But today at 11dpo, everything has dissapeared. I tested yesterday and had a BFN. Do you think i'm out? Did anyone experience this and still get a BNP? Feeling so discouraged ;( thanks xxx