was entering the right side of two double doors and I must have gotten way too close to the other door. As I was entering the door that was being held open for me, another person suddenly opened the left side door and it smashed right into the left side of my head and it got my shoulder as well. To me, it sounded as though someone had just shot a shotgun! I never fell, and I really don't know what happened after being hit, until a minute or so later. I just stood there for a minute and remember my boss asking me if I was okay and a couple of other people asked me if I was okay. I told them that I was fine and that my head hurt just a little but I promised that I was okay. I walked over to put my money up and about 5 minutes later I started feeling dizzy, slurred my speech, talked slow, felt very foggy, almost felt like I was borderline drunk, and then my eyes started to feel very heavy. I then told my boss when I clocked out that I really didn't feel good and he asked if I needed an EMT. I didn't want one but my boss suggested that I see an EMT to make sure I covered myself. They didn't do anything but touch my head and said there was a little knot, gave me a drug test, made me stay for two hours while they finished paperwork and then sent me home with nothing. I went home and went straight to bed around 11:00a.m. on Saturday morning and woke up Monday morning at 9:00...I then called my sister who called me 21 times while I wad sleeping and told her I felt really weird and she told me to go to the ER. I got off the phone with her and passed out until about 11:30a.m. I then went to the ER and told the doctor there what had happened from start to finish with me being in his ER. He told me that it was medically impossible to have symptoms of a concussion two days later and that there was nothing wrong with my head, and I even told him that the left side of my head was so tender and bruised that I could barely touch it. He ordered blood work and a ct scan to be done, and 3 hours later, he comes in and tells me that everything was clear on all tests.... There was no sign of me ever being hit in the head at all. He told me that the only thing he could come up with is it may be some kind of unknown viral infection that caused these problems or I was pregnant. I told him no on being pregnant because I have an IUD and I didn't think he was right on the viral infection either. He left and the nurse came in for me to sign discharge papers and she told me that the ct scan showed a bruise in the same place I said I got hit... But everything was clear?? This doctor didn't make a lot of sense to me and almost sounded like he was telling me a lot of lies and he also made me feel like I was faking the whole thing! Can someone give me advice on why I'm feeling like this? I can't seem to get any real answers from the ER doctor.