I Am Having Issues With Nausea For 3 Weeks Now

I am having issues with nausea for 3 weeks now some things such as smells make it worse. I have not missed mentruals had tubal ligation. Trouble sleeping but tired a lot feeling of butterflies craving food Hungary and thirsty a lot daily headaches for over 2 months now bowel movements are more frequent boons and back always hurt sometimes get dull pains in different spots in atomach