I Donated Platelets Twice So Far. However I Am Getting

I donated platelets twice so far. However I am getting some pain around the chest now adays. It feels like muscular pain but it never came before. There is no tenderness in the pain (i.e if I push around the chest, the pain doesn't come but if I do a push up or strech then the pain comes). Could this be due to Platelet donation ? I have been a regular blood donor for the last 2 years but only donated platelets in the past 2 months twice.