TD is not an acute adverse reaction to neuroleptics. It is a long term adverse effect. A dystonic reaction which can occur acutely, but generally only with very high doses or very potent anti psychotics like haloperidol or pimozide. Ditto for EPS and akathisia. Akathisia is not in of it self dangerous. It is unpleasant however. It is typically treated with anticholinergic drugs. Diphenhydramine is a fairly strong anticholinergic and readily available.
Another serious long term effect of atypical APs is diabetes and other endrocrine disorders, and weight gain. But this is also long term and dosage dependent.
Seroquel is not a significant dopamine antagonist with doses below 200m.g. making it very unlikely to cause dystonia at dosages below that.
At the dosages you are speaking of OP, besides the histaminergic blockade noted above, it is also a strong anticholinergic and andergenic antagonist. Which can lead to dizziness and orthostatic hypotension.
If you are on other anticholinergic or andergenic antagonists, like many older anti-depressants are, you may wish to exercise extra caution and abstain from taking it.
If not that is not the case, realistically, you will in all probability be just fine, albeit sedated and hungry.
By the way, it is chemically related to benzodiazapines, it is a dibenzodiazepine. But it shares no pharmacological similarity to benzodiazapines.