My periods got completed on Wednesday & went out with my boyfriend on saturday. We did not had sex neither did he penetrate me. But since we were too close it is possible that a bit of his premature ejaculated liquid has reached my vagina. I have been facing nausea dizziness pain in lower back since Monday. I have eye problem and have power, and I did not wear specs for two days, I have acidity problem. I am pcos patient too. I have been taking rantac 150 for 2 days twice. Acidity has decreased a bit. But back pain is continuing. Is it possible that back pain is because of the posture we took together even though we did not have sex. My weight is 60 kg. and my lower abdomen has more fat. I am having pain now in lower back and in lower abdominal and thighs joint on both sides. And my head is still feeling heavy.