The period  missed may be due to pregnancy which can be ruled out by urine for pregnancy test. Another reason could be that since you are nearing your period menopausal age group , there might be irregularities.for that please check your serum FSG level.and also thyroid profile. Had there been any covid recovery recently,or 8f you are undergoing severe mental  stress or emotional stress,delay in periods is common.

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Get a urine pregnancy test done If it's negative and it's the first time there is delay, it can be ignored as it can be due to stress or covid infection or vaccination If repeated then need to get evaluated

Check urine pregnancy test.