Feeling sick all the time.

Lately I've been feeling really nausea all the time. My period was a little off last month. It's usually 7 days well it started may 18-29 on the 29 till now having unprotected sex with my husband every night hoping for baby number 2 but at random times threw out the day and I feel like I have to throw up ? Anyone have any ideas ? Maybe my hormones are in balanced or something not sitting well in my stomach I ate ?