Okay i would like some opinions please

So i have been takinh pregnancy test and they will start out with a vvvvfl and after 30 min it would be darker and they kept poping up like this for a week and now they are getting lighter i havnt had any tenderness im my breast and havnt missed my period yet but i got really light headed today out of no where really bad indigestion and i keep getting this tingle below my belly button and it happened today as well two days ago really nauseous but it went away hust these test are really confusing me and i hope it's not a chemical pregnancy