I'm 20 years old, and I've been having headache since a couple of days. Not on regular basis but once in 2-3 days. I also feel nauseous since yesterday. Also, I am having an upset stomach (GAS). And just for your information, I had an unprotected sex with my bf in the start of this month. And I had my periods twice in the month of June. I consulted my family doc for the same, and she said it was because I told pills to extend my periods in May for some family reasons. According to her it was due to pills that I will have irregular periods for 2 months. I don't know, what does this symptoms indicate. Is it migraine, food poisoning or am I pregnant? I'm very stressed out, please help me.