Ovulation 12-18 of September

So lately I haven't been feeling the greatest my stomach hurts my nipples are sore I can't eat or drink in the morning cause I feel like I'm gonna get sick and today I'm doing my food shopping and I thought it was AF (due October 1,2015) coming early but it wasn't it was CM it's thin and white looking not egg whites tho I'm not surewhat's happening to my body  I ovulated  the 12-18 of September and I had sex the 13,15,16,17 with no protection any advice