Somebody. Please help me!

My AF supposed to come on 26/3 but till now she didn't show her ugly bloody face. I already one week late. Yesterday i took the test and get BFN. I got several symptom like cramping on and off, fatigue, sore breast, mettalic taste, food craving, gassy and nauseous. Is it possible for me to get BFP? I've been TTC for about one month. And i really hope this is the time. Anyone please help me to give any opinion or advise. I'm bit lost with all the BfN test that i took :(