insane pregnancy symptoms for 3 weeks straight but not pregnant ?!

I've had some crazy pregnancy symptoms ... I've been pregnant before so I know what it's like ... I'm nauseas , always tired , constipated , my ankles, feet and vaginal walls swell from being on my feel for a certain period of time , food adversions and cravings , hemorrhoids , acne both on my face and body , stuffy nose, severe bloating that makes my stomach hard ... literally the works . My period was late last month so I tested to see if I was pregnant (this was after the symptoms had started already) and I got both a negative home test and blood test so I can't be pregnant . I have had sex since , protected... and outside of my fertile window so it's impossible that I'm pregnant , plus I got my period last month eventually . I've went to the doctor , she checked my thyroid and everything , it all seems normal .. is there anything you ladies can think of ? This has been going on for a month .. I'm not stressed , it's not ovulation because it's been like this  for 3 weeks straight including when I had my period . I don't get it ! All my hormones are fine as everything... I even got tested for stds and that came back clear . Just don't know what to think !