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If you have a cycle of 30 days then you should have ovulated around 6th of Oct. In which case, you probably would not be pregnant as you had unprotected sex 4 days later. However if your ovulation was expected around 10th then you could be.
Missed period, constantly feeling hungry, going off your favorite alcoholic drink, tummy ache can all be signs of pregnancy. Snapping at your daughters and being emotional could be due to stress. Since the home pregnancy tests are negative, there is every possibility that you are not pregnant. However if you need to confirm then you can repeat the test at a lab or a doctor’s or go for an ultrasound.
Hypothyroidism, contraceptive pills and polycystic disease of the ovary can cause delayed or missed periods. Pituitary tumors secreting prolactin can also cause such problems. Anemia and poor diet are other reasons for delayed or missed periods. These causes for delayed periods should be looked into.
It is difficult to comment beyond this on net. Discuss these possibilities with your gynecologist. Hope this helps. Take care!
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