Clomid or pregnancy symptom?

Hi,

I'm on my first round of Clomid and I'm on cycle day 25. I ovulated the 14th day and have a 12 luteal phase, so I should possibly know over the weekend if I'm pregnant or not.

I have been having nausea after eating for the past couple of days and in the mornings and in the shower if I get a little bit too hot, a strange feeling in my head that's almost like a headache with no pain but instead pressure and my breasts are twice the size they normally swell to before AF.

Has anyone had these symptoms and been pregnant or not? Does the nausea and head pressure seem normal for Clomid?

Thanks in advance.