Any unusual discharge after surgery should be reported to your doctor. If you haven't called him or her yet, please do that. Your doctor will be able to give you the best answers as he or she knows your health history the best.
I completely understand your frustration. I think that some folks are coming here hoping that the expert will tell them whether they might be pregnant, but that's really not what this board is about.
My suggestion to all of you who are frustrated is to try and skim over those. I'll do my best to redirect as many as possible.
Looks like you got some good feedback from other members. I just want to add one thing regarding how anxious you've been.
When you find that anxiety about getting pregnant is engulfing you, the best thing to do is reach out to your own GYN or other doctor that you see who has prescribed these medications for you. If you can't get in touch with your doctor, call your pharmacist.
Easing your mind and your stress can bring a lot of things back into perspective.
What type of pregnancy test did you take? Home urine test or a blood test in your doctor's office?
If you haven't been to see your GYN, I'd suggest doing that. The doctor can help you get to the bottom of the reason you aren't having your period. There could be several other reasons aside from pregnancy.