Well I've been around steroid users for quite some time now and the only time I've ever heard of someone getting a hematoma is when I watched the gregg valentino documentary lol. Many, many people have described the symptoms you've had and if it turns out to be not good, it's always been an abscess or infection.
I also saw you said this is your first cycle? Oftentimes when using new injection sites these things can occur because the muscle is not used to having a foreign substance in it so if you stick to what I said above I wouldn't be surprised if the symptoms alleviate. In fact, I'm more certain that's the issue here but if it's not, I'd still be leaning towards an abscess over hematoma. It doesn't really matter though since both of those require you to see a doctor, haha.
Best of luck man.