Hey bros, just pinned a bit and had something really weird happen.

First I pinned Tren E and it went perfectly. Next up was the Test E. Went to pin my quad, aspirated, and got blood. No biggie. Changed out the needle and injected lower in the quad. Same thing happens. Rinse and repeat once more in the opposite direction and it happens AGAIN. Now I have three spots that are bleeding somewhat and at this point i'm pretty mad and just pin in another quad muscle. Goes in perfectly. The fuck?

Now, mind you, I followed procedure to a T on every site and this is the first time I've had this issue. I'm aware I must have hit a nerve or something, but it's insane that this happened three times in a row. Can anyone explain what happened and why the fourth attempt was perfect? I'm somewhat confused as to what could have possibly gone wrong.