"I got the impression that I was just being fobbed off"

After undergoing surgery having an improvised Karydakis Flap to remove a Pilonidal Sinus, I was not recovering as well as I had hoped and I had noticed blood and discharge coming from my wound. I contacted my GP Surgery and attended where they took a swab of my wound but unfortunately my test results were not returned before they closed for the holidays. I felt I was getting worse so I presented at Monklands A&E department. It was surprisingly quiet in the department and I was seen by the triage nurse immediately. I was then put in a cubical and a doctor came in to speak with me. When I was explaining to her that I had now developed another lump as well as the discharge and feeling unwell she took a quick look at my wound and then left the room. On her return the doctor told me that my lump was just "superficial" and was just likely a "pimple" and handed me a box of fluxicillan and told me I was free to go. No swab test, no blood test, just a quick look was enough for her. I got the impression she felt I wasting her time and I was just being fobbed off with the antibiotics. My GP Surgery contacted me when they reopened and received my test results and informed me that I have an infection and that the fluxicillan I was given would not be strong enough to treat it. I have spent the past six days feeling ill, in a lot of pain and letting the infection spread further all because a doctor thought she was able to diagnose a specific infection by simply looking, no testing. My so called "pimple" is also not a pimple but the infection gathering and causing another abscess. I understand that A&E staff are under a lot of pressure especially with time but, when did dismissing patients with a wrong diagnosis become the answer?