Pregnant while on period ?

I literally think I am 100% pregnant. I’ve had moments where I’ve had baby fever and made myself believe that I’m pregnant bc of some phantom symptoms or something and duh the tests have been negative but this time I don’t wanna be pregnant I have too much going on plus I decided that (for myself) having an 18 month old is too young for another one.. I feel stupid taking a pregnancy test but at this point I’m about to bc I have my period but I’ve never felt this way. Diarrhea, throwing up, nausea all day.. vivid dreams everyday (I don’t dream.. rarely) only thing I don’t have is sore breasts which I with had both of my kids.. has anyone ever been pregnant with a period or should I not even take a test.. ? Just scared I don’t wanna be doing something I’m not supposed to if I am but I have my period it’s just been coming a week earlier every single month which is weird too