Last month my period was on 8th of December. ..usually I get my periods in 24 to 25 days so the expected date are 2nd or 3rd of this month ...problem is I hv to attend n function on 5th so I hv travel on 3rd tht to by road which won't suit me as I cn get my periods. .hear doctor have suggested me regestrone 5 mg tablet thrice a day but to the doctor is nt 100%sure tht my period date will postpone so I am worried plss advice me wht to do..