Well since you are feeling well now then more than likely what you experienced is just due to hormones cycling especially if you have PCOS.
Now, the only way to prove you had a miscarriage is with a positive pregnancy test and if you have a negative pregnancy test then you were never pregnant - and given what you said that the penis never entered into you - you are NOT likely to have become pregnant.
So do a pregnancy test first
and honestly since you have PCOS - I would suggest being seen by a doctor on a regular basis
And drinking / traveling does not cause miscarriages.
I wish you well
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no you can't get pregnant this way
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