My arms hurt and I can see a lot of veins?

Idk if it's an side effect from my bcp but I've been having pains in my both my arms, sometimes a little numbness but not as much as just soreness and pain. My veins in my hand and in other areas of the arm are really shown and near my wrists and fingers the veins look purple.

I don't know if this is a sign of blot clots or not. I did a blood drive yesterday and they took three tubes of blood so maybe that's why I'm feeling sore and pains in my arms?