Okay yall serious question, can your body tell if your prego before test can?

Ashley
Well I had my birth control removed may 28,2015. So far no period and I been experiencing weird symptoms. Tender breasts, cravings for spicy foods during the day and sweets during the night. I took 5 tests all came back negative. My fiance and I been back and forth to doctors office due to neusia and heart burn. Could I be pregnant just not have enough pregnant hormone's in my system to get positive reading that my fiance and I want? Or are we just too anxious for bundles of joy?