Difficulty breathing for 4 weeks and now a fever and cough?

Hi

As per the title I have been having difficulty breathing for 4 weeks, on and off sometimes worse than others, along either a dry throat which started before this. The other night I was hit by a really high temperature for the night and sore throat and cough, I still have the dry throat and breathing difficulty and a mild cough. What's going on!? Does this sound bad?

For the past 2 years I've been lightheaded put down to migraines. Now my gp says my breathing is because of anxiety but i don't buy that

Mine turned out to be sepsis so get checked out, especially because of temperature.not worth it. Hope you start to feel better soon 

Helena x

Do you think it could be that serious even though the temperature lasted just a night!?