Should I get help?

I just had my son a month ago and I’m not sure if I have PPD. Would I be able to tell I have it? I can’t sleep at night unless my son is in the same room as me because then I just lay there listening for him and wonder if the person watching him is taking care of his needs. I’m more moody with my boyfriend. I argue with him a lot and get mad at him for little things. I’m also irritable when I have to get up and feed my son. I lay there and pray he will go back to sleep and beg my boyfriend to wake up with him and throw a fit if he doesn’t. For example I punched a wall this morning and made sure he didn’t sleep either by turning on the lights and pulling the blankets off of him. I know it was wrong and after I was like “why did I do that?” I just feel like I have a lot of built up anger. I also feel anxious if my son is out of sight. I can’t even switch laundry without running back upstairs. At night I watch him until I’m exhausted because I worry he will suffocate himself. Please don’t judge I’m just wondering if this could be PPD and if so how do I get help?