First watery eyes, a runny nose, headact and sneezing which went away but soon stomach/chest pain, nausea and a then sore throat and hard to breath?

Need to be checked. With all the symptom especially hard to breath, you should get it checked by your family doctor or clinic .It migh t have started as a viral infection and there may be some complications.If you are having difficulty breathing it needs to be checked asap.