Scared!!😢

Ok so I started af September 25th I only have a period for 3 days its never ever went past 3 days I'm still bleeding and starting to freak out I'm also crampy don't want to go to a er but mite end up going any advice or input what can it be caused from I'm 22 I never had this before so I'm really worried a couple days I even had some brown spotting with the pinkish blood or discharge no rude comments please