What are the chances I something being wrong with me? :/

Hi all! So I'm a 20 year old girl, mother to a soon to be 1 year old babyboy and from what I'm aware of, I had a healthy pregnancy. All I do is worry that something is wrong with me, my mind is so convinced that I'm going to die soon from some kind of serious illness and cause of that, I'm always in a very negative mood. It ruins me. When I start thinking about it, I just wanna breakdown in tears like if I have already been told that I have something, and I get angry. And when I get this way, I get more and more easily frustrated with my son and I hate myself for it. Feeling so angry about something that I haven't even been told I have. I just feel so sure of it and in scared :,( I know I just need to see a doctor but I'm even more scared about that that I keep pushing it off. But this is killing me. And my babyboy needs me. I'm tired of these aches and pains. The stabbing pains that I have in my head sometimes that I had since I got pregnant. But ofcourse every time I told my ob about them, he was never really concerned. As I'm typing, I can feel my neck and my body tensing up. I can feel my feet start to ache. I feel like crying so bad. I'm so freakin stressed. What could be wrong with me??! I feel like I'm the only one that has all these feelings, and all these aches. Like nobody else knows what this feels like...I come here hoping that someone understand. You all always make me feel better.. Please help :(

Thank you. As much as I don't want to, I know I have to :( my babyboy needs me and I can't imagine me leaving him..

Mam, go to the doctor, odds are you are fighting PAD, maybe
some fibromyalgia also, any or all of this is treatable, for the
sake of your son and yourself, get checked. Peace

Larry ***