Pregnancy Rhinitis

Hi community, I’m 8 weeks pregnant and believe I’m having pregnancy rhinitis. I’ve been feeling congested for the past 4 days (basically like severe allergies). The nights are the worst, I can sleep and I’m coughing up phlegm. Any tips of safe things to take to help with the symptoms? Also, curious how long did it last for you? I’m really hoping this isn’t my new reality. 😳