I would use:
"I am facing a dilemma"
A dilemma is a situation in which there are two similar possible choices as to a course of action and you have to decide on one. You are not easily 'in' a decision, nor can you 'have' a decision. You certainly can face a decision.
But given that there are no rules, just usage, my second choice is:
I am in a dilemma.
we will be having an event
The correct spelling isdilemma.
"On a train" is correct grammar.
Grammar.
The grammar is correct as it is.
we will be having an event
The correct spelling isdilemma.
No, "will be had" is not a correct grammar. The correct grammar would be "will have."
The correct spelling is dilemma (quandary, difficult choice).
the drinks are not having hallucinations, they are causing them - therefore: HALLUCINOGEN.
No, it is correct grammar, not a correct grammar.
"On a train" is correct grammar.
no_____If the sentence is You do do that (meaning You are in the habit of doing that) the grammar is perfectly correct and the sentence 'does have correct grammar'.
No, the correct spelling is actually dilemma.
"July has just been started" is not correct grammar, instead the correct grammar is "July has just started."
Grammar.
Yes, that is correct grammar.