Why am I in so much pain?? ๐Ÿ˜“?

It all started 2 or 3 months ago when I was working on a school project and I noticed I started to get a reaaalllyyyyyy terrible sharp pain under my left rib cage, spreading toward my back getting worse when I breath in. This went on for a couple of weeks on and off, then A few weeks ago I got a really bad headache... show more It all started 2 or 3 months ago when I was working on a school project and I noticed I started to get a reaaalllyyyyyy terrible sharp pain under my left rib cage, spreading toward my back getting worse when I breath in. This went on for a couple of weeks on and off, then A few weeks ago I got a really bad headache that lasted for 6ish days but then it stopped. Now I have a really bad unbearable headache (going on 4 days now) to the point where itโ€™s hard to focus my eyes normally and it gets way worse when I stand up. the rib cage pain is back and it brought along a sharp chest pain on the left side. What could it be? How do I get rid of it?!
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