Hi and thanks for you query,
the drugs you take are for what is called emergency contraception
. Its efficacy when taking at most 48 hours after intercourse is greater than 80% in preventing pregnancies, and even more when taken earlier.
Considering the fact that you were exposed to spermatozoa
many times during your fertile period, the chance of getting pregnant is a little bit higher. Combining a such times with other methods like the condom could be advisable.
However, there are some slim chances that you might get pregnant. Doing a pregnancy
test in case you fail to see your periods is sensible. However, your chances of getting pregnant are relatively low but not zero.
Thanks and best regards,