Hello,
Welcome to ehealthforum and thanks for writing
If you had used condom during the intercourse and it did not leak or break then possibility of pregnancy does not arise.Delayed periods can be due to various reasons other than pregnancy as hormonal imbalance,drug effect,stress,anxiety etc.It is difficult to comment without a physical examination and requires a detailed evaluation to rule out the cause.
Regarding the manual termination of pregnancy it can be done under Medical supervision with oral tablets(in early pregnancy)which are available only by prescription.If you suspect to be pregnanct consider visiting a Gynaecologist for evaluation so that you can be guided further.
Take care!