Was your practice targeted enough? Were you crystal clear about your accent contributors when you were practicing? Did you mostly work on the sounds of English, but not the rhythm? Let me tell you something. Rhythm is usually MORE important than pronunciation of individual sounds, because it helps your listeners grasp what you’re saying effortlessly.
Book your Accent Evaluation to see if you might need to work on your rhythm. Have your questions about the pronunciation of individual sound answered too. Isolate your accent contributors and work on them deliberately.