Supposed to start my period tomorrow. Currently taking Sprintec for a birth control pill. Have never really had back pain for a symptom, but oddly have it, plus a headache (which is normal for me), and literally a stomachache (not like an upset stomach) which I also don't usually have. Anyone else have this? I'm not looking for a diagnosis, I just want to make sure I'm not alone. My symptoms tend to vary slightly month to month but this is a first. It's weird. I'm pretty close to calling my doctor if this persists but it just started earlier this afternoon (and it's now about 9:30pm)