Need advice!

Ok ladies, I'm 4 days late with watery cm, slight diarrhea and pretty bad heart burn. I tested the day af was due and got bfn. I'm trying really hard not to get my hopes up but it's killing me not knowing. I don't know if I should test again just yet because the depression I feel after seeing a bfn is unbearable. Any advice or words of encouragement are appreciated!