Hii, I Had Chicken Pox Last Month And I Took

Hii,
i had chicken pox last month and i took 2 Tablets of zovirax in one day .my date of periods was 21 But till today i have not got my periods .last month just after my periods was over i suffered from chicken pox . After the recovery of chicken pox i had sexual intercourse with my husband
so is there any chances of me gettingy pregnant as my periods has not yet arrived
Do periods gets delayed after chicken pox