It's been about 3 weeks since I last had sex. I've been on the pill for about 4 months now and have already passed the pregnancy symptoms that can come with it; in fact with this specific brand I never had any ghost symptoms. Anyways, the last time I had sex was around the 17th, when my period was. I bled once on the 16th, pretty much all day the 17th and then I would say spotted lightly the 18th. On the 22nd I started waking up nauseous and having lower back pains. From there it's only progressed. I still wake up nauseous and have only vomited twice, my back pains are constant, I've had cramping on and off and it mostly feels on my right side, I have serious food aversions (almost everything makes me nauseous), I've been wanting more spicy foods and I HATE spicy anything, I'm tired all the time even after a full 8hrs of sleep, my breasts feel heavier and have recently started to feel more tender but that comes and goes. I've taken one HPT that came out negative and my next period isn't supposed to start until the 14th. I should also mention that about a week or so prior to the 17th, I was on antibiotics and had sex without back-up protection.