HIV blood drawn

I went and got tested by getting my blood drawn at my 12th week mark.   The next morning I woke up to a patch of these brown freckle looking spots on the back of my right hand.   I know nobody in the US reuses needles but I immediately thought by human error, could it be possible?  I showed my hand to a dermatologist but he was unsure what it was.   The test came back negative but now I have a fear.   Should get retested or am I thinking irrationally?     Also, is a 12 weeks test conclusive vs. 13 weeks?

[Vance2335]

Irrational thinking.

So what you saw some brown things...has nothing to do with HIV.
Test is conclusive

[worried1357]

Thanks for the reply.

I do agree the brown spots have nothing to do with HIV.   I am concerned if the needle was the cause for these brown spots,  which would mean it was dirty.   Then who knows if HIV was in the needle.  I guess it's irrationally thinking but it's hard to accept when you're on this side of the forum asking.

[ThunderCats555]

US is a developed nation and quite advanced in medical field.
They strictly adhere to universal precautions. As such, no worries!