I don't really do any of the test or temp things but my timed ovulation after my period is the 18th well today is the 18th and I had sex on the 14th and 16th. On the 16th I was really horny and "wet" which I'm thinking was cervical mucus same as the 17th. I've changed my diet to a vegetarian diet so I hope that doesn't mess anything up. Today the 18th anything I eat is upsittin my stomach, I'm nervous that my new diet is going to interrupt my ovualtion... any help is very much apperciated.

Yeah, you could be ovulating. No one online can tell you for sure whether you can. I'm assuming you're trying to become pregnant. If you really want to know exactly when you're ovulating, you'll have to take your temperature down there and really pay attention to your cervix or start using the test kits. If you're OK with just making sure you're having sex around the time you're most likely to ovulate there's nothing wrong with that though.

There could be a number of things causing the upset stomach. Even if you have conceived it's unlikely that you would experience an upset stomach so soon. It could be from stress or maybe eating something bad yesterday or earlier today. Again, the only way to know for sure when your ovulation is is temperature/checking your cervix or test kits.

How do I check my cervix for signs of ovulation? | BabyCenter (this article doesn't mention it but the other day in my human sexuality class my teacher, who's a dr, said that your temperature will drop below 98.7 the day you ovulate and then rise afterwards. Can't say I've ever checked my own temperature though to see if its true)