Preventive measures symptoms and conditions

I started taking Levaquin on Saturday for preventive measures for knee surgery. I had taken Keflex the week before and had an allergic reaction to it. Extreme itching on my hands, hips, shoulders and feet. I broke out in hives and my lips, eyes, hands and face swelled up. I quit taking Keflex and then a week later, they started me on Levaquin. So this morning, Tuesday, I had been on Levaquin for 3 days, I woke up feeling fine. I was up for about 10 minutes and the back of my head was itchy. I itched it and noticed that my fingers and hands were starting to swell. I took a sip of coffe and my lips were starting to swell. Within 10 min. I was swollen, itchy, in an extreme cold sweat, my throat was swelling and I could not breath very well. I grabbed my phone and called 911 and I could barely remember my address. I told the dispatcher that I was going to pass out and I did. When I came to I could hear the dispatcher trying to get my attention. When I got back on the phone after passing out, she said paramedics were on the way. They showed up about 2 min. later. My blood pressure was 101/53. I ended up going to the hospital and on the way there, they gave me a shot of epipedirine and benadryl. When I got to the hospital there were 8 people working on me. I got a shot of pepcid and a shot for the rash that was covering 90% of my body. I was still having a hard time understanding questions and was having a hard time staying focused to answer questions. I was in the ER for about 4 1/2 hours for anaphylaxis but they finally got it under control. Now I get to have epi pens to carry around with me since this was such a severe reaction. I was told to look into an allergy screening so I think I might see how much the insurance will pay on that and maybe get that done.