I had a bunch of blood tests recently and i noticed multiple transparent sphere shaped objects inside a syringe and i am worried about what they were because i have been feeling very unwell after i had 7 syringe of blood tests taken.

The pain i am experiencing feels like sharp objects poking my organs inside my chest. sometimes i experience the pain while breathing deeply and before i close my eyes to sleep i get the feeling one would experience from sudden fear. On top of everything i mentioned i think a heartburn is another symptom i am experiencing. All of those symptoms have arisen right after those 7 blood tests i mentioned.

Please can somebody explain what those transparent round white objects inside the syringes might be? Have i been poisoned? Will i die? Please help!