fatowl:
Have the heavy cream with dinner or for dessert. Do not drink it after 7 PM. You have acid reflux from it, which is caused by increased acid production in response to the fat in the cream. Pepsid and other similar acid inhibitors may help.
TheLordoftheWings:
Damn.. I usually wait until around 10 or 11, then wait an extra hour before sleeping. If I drink it too early, I'm usually too full to eat anything else throughout the day
What Fatowl is saying is to have the cream after you have finished eating for the day but several hours before going to bed if possible. This will get a lot of the digestive process done before you lie down, which often puts pressure on the stomach. I speak from experience here. Having said that, it does depend on the amount of cream. I find I can take 300ml just before bed and be OK. Any more and I have the problems you describe. YMMV - The trick is finding out what you can get away with.