It's a blend... it's probably 200mg test Cypionate and 200mg test enanthate.
It actually shouldn't be painful, it should hold with 2% BA and 20% BB. High quality test e should hold at 400mg/ml with just 2% BA.
My thoughts:
1. You could be someone who responds to some of the solvents in an undesirable manner. Maybe the carrier oil is producing some sort of allergic reaction or the BB is not something you're used to. Have you ran many cycles?
2. Test E could be of low quality like going on 4T stated. I've touched on this subject before, do a search.
People used to brew with 5% BA and not complain of the crippling they do now. I doubt its the BA content.