Gaining

You'll need to have excess calories to gain weight no matter what you're eating or drinking. Use a TDEE calculator to figure out how many calories you need to sustain your current weight. You will need to exceed that number consistently in order to see results.

Unless you're pretty small, only getting 2000 calories a day probably isn't going to cause a gain. You have to be taking in more calories than your body burns, which for most people is somewhere around 2000.
If you mean eating 2000 cals and then drink heavy cream on top of that, then yes, that should cause a gain.

Be careful taking pepto too regularly, it can lead to bismuth poisoning. If you're having to take it frequently, you should probably find a different way to gain.

I take my cream twice a day to get it all in without many stomach issues. I always use a lactaid or equivalent.

Once at about 2:30pm (1/2 pint)
Once about an hour before bed (1/2pint)

I just keep the little half pints in my office fridge inside a plastic grocery bag so no one sees it.

So allroy sez, seems like you should have some with breakfast too!

🤔🤔🤔 That would be 2400cals of pure fat...everyday!😳🥴🤤

LOL, so ok, maybe it is NOT enough! Still your could keep working up from that to more ... right?
😁

Oh, those good fattening habits! Having cookies ... drink heavy cream, eat a meal ... drink heavy cream, going to bed drink heavy cream!

I’m pretty sure drinking cream after every meal is what’s referred to as the golden triangle 🍩🥛🍛🥛🍕🥛

Hmmm, the golden triangle huh? I was just thinking it would be referred to as constantly larger clothing!

Blubberfly effect