Is this normal? or could this mean pregnancy? I have other pregnancy-related symptoms, but those symptoms could be so many other things as well. Therefore, I'm wondering how common it is to not start a period during the 4th week. This is my first time using NuvaRing. I can't remember for certain if I waited the iniital 7 days prior to having sex; but my friend also informed me that taking antibiotics can interfere with birth control. The same day that I was prescribed the NuvaRing, I was also prescribed daily Amoxicillin for acne. Is anyone aware if this could be a possibility too if I AM pregnant? Symptoms I've had started about 3 weeks ago (I believe 1 or 2 weeks after intercourse). At that time it was extreme fatigue, which I had attributed to starting a new exercise regimen. For about a week and a half now I've felt sick to my stomach as though I need to throw up on a daily basis all day long. I've had bloating in the last few days and some cramping in my lower abdomen similar to IBS symptoms, which I also have, but my medication for that does not help. The last couple weeks I've had all over back pain mostly when standing. I've also had very tender/sore breasts for a couple weeks. Also, for the last 2-3 weeks I've had nearly continuous headaches. I've needed OTC medications for that 2-3 times daily. And, I have had a lack of appetite yet I get to feeling SO hungry that I feel sick. Sometimes eating doesn't help. All this sounds to me like I need ta get tested! So... also, what is the best way to get the most accurate and quick results?