I have has swollen boobs and day one of a missed period

My boobs are swollen and every morning I wale up feeling so sick been getting headache I been praying yo be pregnant.. I have tested before the 21st of step. Cause that's what the feeling like vomiting every morning started now I find my self peeing a lot and just wanting cantlope and I scared to get my period and all this be in head. Has anyone ever felt pregnant before they knew and had sympotmes like mine this would be my 2nd