Congrats! What test?

Grats on the job. I dunno if its food allergies. I feel the same way with coffee, sometimes. I think its either due to your tolerance--e.g. You're too used to that amount of coffee, and require more to feel the effects; or, it's because it spikes your blood sugar, due to a carb overload. If you drink very sugary coffee, that could definitely be it.

I've noticed that, for myself, eating something with the coffee tends to help. And, if that weakness and agitation pops up again anyway, then eat something again to stabalize the low blood sugar broight on from the body overcompensating by releasing too much insulin to combat the sugar overload: or drink more caffeine.

Trust me. I'm a drug veteran and health nut.

How many cups do you drink a day?

Congrats and good luck on the job

That's great