Baby spitting up when laying down ??

We will nurse and he will be burped. I’ll lay him in his bassinet and he will after awhile, spit up.. sometimes coming out of his nose too. At times he will even sound a little “snotty” or congested in his nose... am terrified of

Him choking and ya Not hearing it. Is there anything more I can do than burp him after feedings??!😕

He is a month old this week