Knot after hitting a vein

[Data1000]

After injecting 2 CCs of test/EQ into my glute with 1 1 1/2" pin, I pulled out and immediately had a sharp pain and a knot under the skin. I assume I hit a vein. Although I normally aspirate, I did not this time. A couple small drops of blood came out, but nothing so unusual and quicking stopped after I applied some pressure.

My question: Assuming I hit a vein or passed through a vein and quickly had a knot of blood, were the injections likely still effective?

Thanks.