Diziness and unable to sleep. My doctor!

I had take bhang(Cannabis) 20 days ago and had panic attack, from that day i am feeling dizziness and anxiety. 5days ago i had another panic attack , so decided to consult a psychiatrist and dr tell me it's happening because of anxiety . Dr prescribed me tab Paxonil plus and Placida plus with Prat 40 and said that i will be fine . After taking these medicines i have developed some problems. 1) whenever try to sleep i hear sounds and visions , unable to sleep and feeling sleepy all day with dizziness. 2) Constipation and no desire to eat food at all with vomiting like feeling. I called my doctor regarding the same ,he said it's happening because of cannabis and those medicines will fix your problem but you have to keep patient. I am taking these medicines from last 5 days and before that last 2 problems wasn't there. Because of this i am feeling very anxious . Need some advice.