Please help need advice?

So yesterday I thought I had a blood clot in my leg because it was throbbing and I felt bubbling in there but it wasn't swelled nor did I see any marks or anything. But I have bad anxiety where my body mimics pain that I think I have but don't so I'm not even sure because its gone today I don't feel it at all but I ran on te treadmill today and I got chest pain that didnt relate to my breathing and it hurt in the center of my chest and I'm short of breathe and I'm wondering if its cus of my anxiety or something because I tend to get these but I'm worried that I have a pulmonary embolism but I'm wondering if it could progress this quickly if I even had a blood clot. I've been having pains everywhere today and I'm not sure why but I'm really scared so somebody please help me.