While i was playing basketball i got hit in the chest by someone's shoulder when i was guarding them and now it hurts. also, i cant do pushups and more as when i try the middle of my chest hurts like crazy. it's been the same for 2 weeks?

Suggest X-rays of sternum and ribs. Possible sternal fracture, but may also have costochondral dysfunction, and either way, it is best to objectify the pain generator so, successful and comfortable interventions can commence.

Sports injuries like that can take a while to settle down, even up to 6 weeks. Might be a good idea to see the PCP for XRay and other imaging studies if indicated. Meanwhile NSAID's with food for pain & inflammation plus some Epson salt warm water compress might improve symptoms.