Could this be part of an allergic reaction?

I'm allergic to all antibiotics except clindamycin and I have an infection now so dr prescribed it. I took 2 pills yesterday and now today I feel really weird like I have a headache and it's enough to be annoying but not really enough to take anything, I've felt sorta hot and sweaty, I'm pretty sick to my stomach feeling and have diarrhea but then I have times where I can't decide to throw up or if I'm hungry. When I've had reactions in the past my throat swells up or I get itchy so this is different but I don't get why I'd feel so bad like this when I'm taking meds to get me better.
Could this be part of an allergic reaction?
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