Mononucleosis or just a long cold? - #6647

Two weeks ago, I started feeling super tired, like the kind of exhaustion where you sleep 10 hours but still feel like you got hit by a truck. At first, I thought it was just a cold cause my throat was killing me, and I had a slight fever (around 38°C). But the weird part is, it’s been days, and my throat is somehow getting worse instead of better. My tonsils are HUGE, almost touching, with white patches on them. I don’t usually get tonsillitis, so this freaked me out a little. Then my friend mentioned mononucleosis. I didn’t even think about that at first, but now I’m worried. My lymph nodes in my neck are super swollen, almost like marbles under the skin, and I feel like I have no energy to do anything. Plus, my spleen area feels kinda weird? Not exactly painful, but I can feel a discomfort when I press on my left side. Is that a sign of mononucleosis too?? I never got tested for mononucleosis before, but I read it’s sometimes called the “kissing disease.” Thing is, I haven’t kissed anyone recently, so how would I even get it? Can you catch mononucleosis from just sharing a drink or using the same fork as someone?? I do work in an office where people are always sick, and I’m not gonna lie, I sometimes sip from my friend’s water bottle without thinking. Could that be enough?? Another thing—I tried taking antibiotics (leftover amoxicillin from an old prescription, I know, bad idea), and I noticed a rash on my arms a day later. Then I read that people with mononucleosis can get a rash from antibiotics. Does that mean I definitely have mononucleosis, or could it still be strep throat or something else?? I haven’t gone to the doctor yet cause I figured it was just a virus, but now I’m not so sure. If it is mononucleosis, how long does it last? And do I really need to avoid sports and workouts for months? I read somewhere that mononucleosis can cause spleen rupture if you exercise too soon—how do I know if mine is at risk??