jnr,
First, you are on day 24 of your cycle. Day 1 was considered the day of your abortion. So your period should not come for another 4-8 days depending on the regularity of your cycle.
Most importantly, you need to do something about your form of birth control so you don't have to use the "emergency pills" everytime you have sex! You need to get with your physician who prescribed the pills, and explain that you need a new form of birth control. Those pills are meant to be taken in emergency situations. Even using condoms, you should be using a second form of birth control...especially since you just went through an abortion, and you already have an STD. Your doctor can offer the "pill", IUD's, diaphrams, and injections to name a few. You need to get that done most importantly!
Most likely, you are not pregnant considering you used the emergency pills. Call your physician though, and get on some form of regular birth control ASAP. Remember, that condoms protect you from STD's except warts (HPV), and Herpes....but it is wise to use them along with other birth control.
Good Luck,
Julie