There's only one coffee that keeps me awake- I need help identifying it

Hey guys I really need your help on this. I've always seen baristas as this mighty all-knowing coffee gods and my broke ass now requires your blessings.

So I have a weird condition- if I drink coffee I sleep. It's more potent than melanin and my brain powers down faster than a laptop thrown into seawater. Recently I've also started to get diarrhea but ig it's stress.

I've tried everything guys. Whole beans, crushed beans, DATE SEEDS. And then I find a solution to my problems- Starbucks frappuchinos. The hot ones knock me out instantly but the frappuchinos keep me awake for 20+ hours.

Now I can't afford Starbucks regularly, it just isnt sustainable. But I also hate being the 'sleepy dude.' Help a guy out?

Edit: Wow I never expected such comprehensive responses! Thank you to each and everyone who replied. I will definitely try some of the things discussed

I feel I need to add a little bit about myself. I do not have ADHD but some other condition, and neither the time or resources to get tested. I do however have ADHD friends and I know the symptoms lol

I have iron deficiency and Vitamin D issues, been on pills for three weeks now. Too short to see an effect but they did contribute to my sleepiness and I know they contribute something in this.

I will ask the baristas to use the frap coffee for a normal drink, I didnt know they were different coffees. I can say this isn't a sugar rush really, I stay up 20 hours easy after one frap.

I suggest you guys to read u/Negative_Walrus7925's comment below for some very interesting information about metabolism, linoleic acid and how it all relates to coffee sleepiness. Very well-written and really makes you think about your dietary habits!

·Edit2: Welp went to my local starbucks and they said they cant substitute the frap roast into normal coffee coz of company policy. Im very confused but will try another branch!