I was hit with a hardball on my arm 4 months ago and then my arm turned black blue and red from elbow to shoulder now i feel like i have 2 blood clots?

Trauma: The bruising and ecchymosis is normal after trauma, some swelling could be normal or could be internal bleeding (hematoma). A blood clot (thrombosis) is rare after direct trauma but is possible if a vein or artery was directly injured. The only way to get a diagnosis is to see a physician and possibly get a ultrasound of this arm. See your doctor.