Hello and hope you are doing well.
The sneezing, and nasal congestion could be due to vasomotor rhinitis, in which the symptoms occur in response to a trigger, like eating spicy food or going outside in the rain or cold. The primary treatment is simply avoiding the things that trigger your symptoms. It is often treated with a drying nasal spray (like Atrovent) and antihistamines like chlopheneramine and lovatidine are effective. Nasal decongestant drops too relieve congestion. So, along with the antihistamines, you can try nasal sprays. If symptoms worsen, please consult your primary care physician for further evaluation.
Hope this helped and do keep us posted.