Constipation, Breathing Problem, Anxiety After Increasing Dosage Of Clobazam/onfi. Side Effect? How To Control?

I started taking onfi/clobazam two months ago and I started at 20mg then I had to increase it to 30mgs a week later. I started having constipation problems and difficulty breathing which I thought was anxiety, I also lost my appetite. So I told my neurologist about it who said it doesn't cause those symptoms and that I had to take a laxitive each day. I reduced the medicine myself to 15mg. The breathing difficulty stopped but I I still had trouble going without the laxitive. I had my appointment a few weeks ago and it appeared that the onfi was controling the seizures so they told me to increase it to 30mg gradually. I started taking 20mgs for a week and a half now and today I am having difficulty breathing again. I believe it's because I went up on the onfi because it is not anxiety, I checked my heart rate and it was normal it was 71