Too much bloating
can cause excessive salivation
. Make sure you take your antacid
30 to 45 minutes before your major meal to avoid excess acid formation. for time being you can double the dose of antacid to twice daily and see if your symptoms come down. Saliva during sleep can happen during dreams etc. Do see your Psychiatrist
for the optimum dose of nexito also. That should help. I hope these things help.