You need to do one of two things:
1) get a new source. I've noticed that really good Test Prop quality doesn't hurt much more than cyp or enan. The first time I took test prop I experienced the exact same thing you are experiencing- swelling and crippling pain. Don't abuse the NSAIDs. That won't be good for your stomach or kidneys long term.
2) this is the best immediate option: buy some painless pumps. It's expensive but worth every penny, IME. Mix 1-2cc's of painless pumps with your prop. PP has glycoproteins that do a number of things, mainly triggering growth factors, reducing inflammation & triggering cell-to-cell communications. This third point is especially neat, in that all the benefits that test & the other glycoproteins would bring get shared with the surrounding cells, causing the entire region of musles to grow and heal together. The base compound of PP is synthetic synovial fluid, which is the stuff that supports your joints:
"Hyaluronic acid helps to make it thick for its function. Synovial fluid has two functions in the body, which are to lubricate the articular cartilage at the ends of the bones in the joint and to supply nutrients to the articular cartilage, or a thin layer of protective cartilage in the joints."
The PP option not only will reduce some of the unwanted inflammation via glycoproteins but also give you some out-of-this-world pumps, increase local nutrient partitioning & recovery and probably give you an inch or two in the legs/arms over the course of 6-12 months.