Bro, it is just PIP. Could be so many reasons. If you are legit nervous, circle all the redness with a sharpie, if the redness continues to spread towards the heart along with fever I would worry about inifection.
Maybe you are having a bad reaction to the oil, maybe the strength is to strong, maybe you didnt inject it all into the muscle. Everyone has had bad PIP at one time or another. I once injected a barrel full of air into my quad with Test. I once sneezed after injecting which caused me to lose control of the needle that flew in the air and landed in my leg at a weird angle.
PIP could last 7-10 days, maybe longer. Alternate sites, make sure you are injecting in the correct sites. I believe Quads are the best for beginners. You will be ok, unless you are having fever and spreading of the redness, I believe Dr.'s are unnecessary. BUT you do you.
EDIT: I would also use heat and ice packs alternating on the site.