having pregrant symptoms ! but not sure if i am

hi i am really hoping someone can help me and give me some info. for about two weeks now i been throwing up and getting naused at about the same time everyday. i dont sleep at night b-cuz i am so naused. my stomach is getting bigger and my breast feel like something is in them i dont know how to explain that to well though and also they are getting darker. i am not sure what that part is called. any info would be appericated thanks and god bless. i have not taken a test. the other times i have taken a test with these symptoms it comes back neg. but dr's dont know what is causing this. they just keep telling me it is the cyst on my ovary but i gain like 20lbs in 2 weeks and i dont eat b-cuz everything makes me sick

Hi i dont know if this will help but my sister kept doing pregnacy test and they kept saying that she was not pregnant but she had all the same symptons as you have so she explained this to her doctor and got sent for a scan and she was pregnant aparently some pregnacies dont show up on a test. i myself am going through the same thing as you i have not had a period for 3 months and feeling sick gone off different types of foods constanly tiered