Hi welcome to HCM.. You have lactose intolerance .So try to avoid taking milk or dairy products.... Just now you Have sinus problem ... So for that symptomatic management done. For congestion relief take benadryl like anihistamininc drug .... Steam inhalation with eucalyptus oil added also useful.... Peppermint oil local application or inhalation useful for open all sinuses. If headache and pain more take simple analgesic ... If problem not resolved paranasal sinus x ray taken for detecting severity ... Consult physician for examination if problem not solved. Take care