Feeling stressed 😩

Ok so I’m 3 days late on period, boobs are sore and look a bit fuller as noticed by me and bf. and even people at work. I’ve got slight cramps, headache, not sleeping and tired but still having negative tests. I’m 26 days normally and regular. So I’m so confused uk doctors won’t do blood test I called them and they said rely on tests. Monday I did have a very very faint line on Clearblue but heard blue dye can give false positives and I mean super faint. Has anyone else had this and come on or been pregnant I’m 17dpo 🤷🏻‍♀️