From your history it is not clear when you had sex.
If you had sex during most non fertile period i.e, roughly first and last week of period, there is less risk of pregnancy
Go for pregnancy test after 7-8 days passed of your expected date of period.
If there is pregnancy, you can postpone your cervical biopsy
schedule in March.
If there was some doubt in past biopsy and this time cervical biopsy is a must, then consult your Gynaec and discuss about your problem.
Ok and take care.