I'm a 17 year old girl and I keep having this pain in my chest any ideas?

justjess2315
So I am 17 years old and I can't getting pain in my chest and under my left boob. Now I do have really small like boobs for my age I don't know if they are still growing or not I should probably ask a doctor. (my older sister says hers didn't really come in til she was 17 so it could be)

But like i don't know do you guys think that could be what it is? I'm really thin and mostly fit so I don't think I'm having a heart attack. Though I do eat a lot a junk.. But i googled it very rare for it to be something serious at my age. I also don't think its breast cancer since a history does not really run in my family and its less likely for girls with smaller breast to get it.

I am totally aware most of you are not doctors but just like serious feed back guys if you are just going to make some stupid comment just save yourself the time and don't Thank you!
Updates
+1 y
Sorry in the first line I meant to say I 'KEEP" But i said can't so just yeah
correction
I'm a 17 year old girl and I keep having this pain in my chest any ideas?
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