am i pregnant?

Hi every one
im 17!!!! in january this year i had the depo injection (i think thats what its called) me and my boyfriend disscussed about it and decided we would try for a baby but until now (November ) i have just started my periods and weve been trying for a baby since march when the shot ran out basically. but i wasnt sure that i have to wait until my periods started again before we could try for a baby but my boyfriend last week pointed out to me that i had all the symptoms of pregnancy, tiredness,sore nipple/breasts,peeing all the time, feeling hungary,and a change in taste, but we tried a pregnancy test and it came up negaitve please help …any advice on getting pregnant would be great or any info

thanks 🙂