Hello, Joy! Welcome to IAWP. Looks like the symptoms you are describing are WD. You've been quite fresh off of the drugs, so it may take a while to improve. The problems with speech, lack of coordination, muscle rigidity, in many cases ataxia, are very common WD symptoms. Same with cognitive and memory problems. Inability to think clearly, feeling depersonalised and derealised. How long exactly did you spend on the drugs?