Question for Any Blood Donors

This is probably TMI-ish, and there's a gross picture of my vein, so I'm putting it behind a cut, but I need an opinion from someone who is not hypochondriac me.
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I know I'm crazy-pants, and I have at least one person reassuring me that there's nothing wrong, but I don't wanna get a blood clot or something, so if someone with more knowledge about this sort of thing could reassure me, that would be great.