Sniffle allergy like symptoms ? Help?

Emy
I'm feeling so terrible all of a sudden in the morning I have a runny nose, watery eyes ..etc. and I still have I it plus I'm going to this swimming thingy I have to go to tommorow ughh . Does anyone know if there is any remedies I can try ? And how long are they supposed to last . I don't think it's flu but it's kinda feels like I have allergies 🤒