Secondly,excessive daytime sleepiness can be due to sleep-wake cycle disorder like in night shifts, sleep apnea and other sleep-related breathing disorders, psychiatric disorders like anxiety,depression and schizophrenia,diabetes,obesity,restless leg syndrome,use of drugs or alcohol and narcolepsy(Abnormal
sleep disorder leading
to excessive daytime drowsiness).In your case,I feel that all is related
to stress and anxiety and allergic rhinitis.