Can I be pregnant

A

So I have a 6 month baby I’m a first time mom I do not want more baby’s my pregnancy was so bad and honestly I’m not financially stable at the moment . I got on birth control as soon as possible I got the depo shot first time getting it as well never had it before. I hated it so much my mood swings were horrible I did not get my period only for like a week and it was just spotting. Before I got the shot I got tested for pregnancy of course and it was negative. Well I have to get it again on Wednesday the nurse didn’t say anything about not having unprotected sex this week . Well these past weeks I’ve been having pregnancy dreams like crazy every night . I haven’t had my period since I gave birth and honestly I don’t have much symptoms I do need to pee a lot though every morning I have to pee so bad . Is it even possible to get pregnant while on the shot