Feeling awful on test E but not on test U

I tried 1 to 2 shot of test E each week and i feel like i am injecting water , but when i used the test undecanoate i usually felt good the day after and for a big couple days after with it , i wanted to try a shorter half life solution so i bought some test E, both are UGL brand , and both doesn't have the same carrier oil, one is sesame seed oil (test U) the other is MCT oil (test E) and i don't feel anything with this one, maybe the oil is the problem here ?

Or maybe it's because my body are still producing test so i don't feel the full benefits of the test E because of HCG ?

The sesame seed oil are much thicker than the other and i am a little bit allergic too, but it still work for me, any advices ?