Gaining

For the past week I've engorged myself at grad parties and snacking hours upon hours daily and I've logged at least 3500 calories everyday the past week with some days reaching well past 4k calories. I'm just wondering if I'll see some results soon, I know delayed gains are a thing, but long much longer will I have to feed past 4k calories everyday to see some nice stretch marks or some judge.

I'd like to add I'm 178lbs as of now and this has been my plateau for about 2 weeks because for some reason my weight is staying here. I was 135 back in August and was able to gain steadily while eating about 3k calories a day, and now with my appetite and capacity larger I'm stalled. Any helpful suggestions or thoughts if I'll have a delayed gain to break into 180s?

This week I'm going for another big number everyday and I'll be stopping near a creamery close to my house to grab their peanut butter reeces shake daily which packs 1800 calories alone.

Well the simplest answer is eat more.
Your body got used to what you were feeding it and simply needs more to gain more.
If you want the weigh, it just takes a little more effort from time to time to just keep getting bigger. You can do it!