<human>: A bit over a week ago I got a small burn on my leg (touched exhaust pipe of motorbike). Nothing bad at all, but many people told me of the awful cases they'd seen or experienced where the leg got infected. Several looked at it and said "it's definitely infected already".

Went to local pharmacy to get some cloth and iodine just to make sure I keep it clean and covered (still open enough to get some air) as it heals, but the woman there looked at it and told me I definitely better take some antibiotics. They were cheap enough, so I bought them, googled the antiobitics (cefadroxil/novadril), googled infections as a result of burns, and decided I'd take them.

Her recommended dosage, and what I found online, was that I should take 1.5 g in the morning, 1.5 g at night. 

Having never liked taking meds, and knowing antibiotics are heavy stuff, I just took 500 mg the first night. Next morning took 1 g, felt quite nauseous and out of it in afternoon, just 500 mg in the evening... next day, 500 mg morning, feel bit sick, google more, sounds like this is just the battle going on in my body, will tough it out for few more days just to make sure the leg is ok... 1 g at night.

Today, 500 mg in morning... feeling better, leg itchy, healing, seems to be improving... 500 mg at lunch.
One hour later, bit dizzy, very nauseous, go home and fall asleep for 3-4 hours.

Diarrhea, go to bathroom to vomit a few times but just dry heave. Drink some water, same thing... more diarrhea. Have a few crackers, 3 minutes later vomit. More diarrhea. Have a cold 7-up, vomit, later more diarrhea.
First time I vomited, while spitting up, there was small amount of blood.

Feeling bit better having vomited, but can't eat or drink anything without vomiting... Will this pass? Should I be really concerned/go to hospital?

.....

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Leg got burned, probably infected, took antibiotics for 3 days, now vomiting and diarrhea. Normal? Or should I be concerned?