took plan b?

I took plan b because I was worried my birth control wasn't going to work because of antibiotics I was on for a kidney infection. I took plan b a few days ago, gen hours after I had sex. The first two days I felt sick. Mild cramping and just like vomiting and had a lot of clear discharge.Now I have an increase in appetite but I'm not sure if it's just stress eating. Any ways beside that I feel fine now and haven't been spotting or anything. Is this normal ? Is it working ? Don't get me wrong I'm wondering because everyone tells me they have worse symptoms. I felt like shit the first 2 days but now I feel find besides being hungry. I'm trying not to stress out because I don't want to delay my period but does plan b actually work ?

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