I've recently been waking up with a sore/dry throat, stuffy and runny nose, with frequent sneezing and dry coughing, is this serious? over 4 days.

Not really: Given this isn't quite cold and flu season (at least where I'm from), your symptoms appear to be more in tune with allergies and a cough due to post-nasal drip from the inflammation occurring in the nasal passages and sinuses. Usually a good steroid nasal spray (i.e. Flonase or Nasonex) with or without an antihistamine (i.e. Claritin or Zyrtec) works pretty well.