Am I the only one feeling this way..feeling pregnant but not sure

Haven’t really been experiencing much symptoms. Felt nauseous off and on the past few days, felt lower back pain last Friday. A part of me is hoping that its my month and I’m pregnant but then a part of me doesn’t feel “pregnant” since I haven’t been experiencing much symptoms. I see women posting about implantation bleeding, is it usually one of the first symptoms that confirm pregnancy and is it common for women? Some advice would be helpful and if I’m the only one feeling this way.