Approach controller reported of a possible loss of separation when an aircraft went around and was i...

Narrative:

Right after a runway change from runway xy to runway xx; aircraft X checked in with the incorrect ATIS requesting an approach into ZZZ. I issued the correct ATIS; told him which approach to expect; and since he was only requesting one approach issued his abnormal missed instructions. Those instructions were runway heading; maintain 3000. At this time my sector became saturated with inbounds to ZZZ; it was abnormally busy because the airport was ground stopped earlier in the day due to hard IMC conditions. After clearing aircraft X for the approach; another controller helped by coordinating the missed instructions to the tower. About this time we were notified of a priority handling inbound to ZZZ; requesting to land runway xy; I started breaking air carriers out of my sequence; notifying them of the priority handling and aircraft X would be the last approach to runway xx before aircraft Y. I switched aircraft X to the tower. I was then informed after getting relieved from the position; we possibly had a loss between aircraft X going around runway xx and aircraft Y landing runway xy.

Original NASA ASRS Text

Title: Approach Controller reported of a possible loss of separation when an aircraft went around and was in conflict with an inbound opposite direction aircraft.

Narrative: Right after a runway change from RWY XY to RWY XX; Aircraft X checked in with the incorrect ATIS requesting an approach into ZZZ. I issued the correct ATIS; told him which approach to expect; and since he was only requesting one approach issued his abnormal missed instructions. Those instructions were runway heading; maintain 3000. At this time my sector became saturated with inbounds to ZZZ; it was abnormally busy because the airport was ground stopped earlier in the day due to hard IMC conditions. After clearing Aircraft X for the approach; another controller helped by coordinating the missed instructions to the tower. About this time we were notified of a priority handling inbound to ZZZ; requesting to land runway XY; I started breaking air carriers out of my sequence; notifying them of the priority handling and Aircraft X would be the last approach to RWY XX before Aircraft Y. I switched Aircraft X to the tower. I was then informed after getting relieved from the position; we possibly had a loss between Aircraft X going around RWY XX and Aircraft Y landing RWY XY.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1415043
Time
Date	201701
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Large Transport
Flight Phase	Initial Climb
Route In Use	None
Flight Plan	IFR
Aircraft 2
Make Model Name	Medium Transport
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 1
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Approach controller reported of a possible loss of separation when an aircraft went around and was in conflict with an inbound opposite direction aircraft.