Sharp Pain right bicep area

Bekah • BFP 03.03.15 MC 04.07.15 BFP#2 04.08.16 -praying for our Rainbow; all while working in a daycare
Hey ladies, I'm 7 weeks along and for the past 2 days when I lift my right arm above my head I get a sharp pain in the middle of my bicep. 
It's gotten worse as the day goes on today, even to the point of me sitting down and it 'flaring' up..
Just wondering what it could possibly be/any recommendations about what to do.. I'm trying not to worry too much about it, but I also don't want to pass it off as nothing.