Injected into veins?

Hi guys. i did my test shot now, in ventro gluteal site, i think i was in the correct place, or a little bit below, i had no problem before..

It was kinda painful when i pushed the needle in, but usually is, so i thought it's normal.

While injected in, i felt like the oil is going somewhere, like flowing?! Right after the injection i saw little bit blood in the syringe.. i felt like electric shocks in my fingers, and had hard breathing.. After 5-10 it's like i smell oil,and taste oil.. Otherwise everything all right

What happend? I tried to keep calm, but ah i fucked up