as it's my first time being pregnant I'm not exactly sure what to expect. we've done some classes but I still feel like…

as it's my first time being pregnant I'm not exactly sure what to expect. we've done some classes but I still feel like I don't know exactly when the time is. is it normal or does it mean the times approaching if I feel the baby moving lower and lower as well as like a pressure that comes and goes? I'm constantly feeling like I have to pee, sometimes even right after I go it feels like I have to go again lol. anytime I move, squat or even sit it feels like I'm going to pee my pants. he's pushing up in my chest and I'm getting sharp pains that make me lose my breath too!