ZDC CTLR EXPERIENCED OPERROR AT FL190 DURING BUSY/COMPLEX TFC CONDITIONS; INCORRECTLY THINKING ONE ACFT WAS CLIMBING.

Narrative

WHILE WORKING SECTOR 27 RADAR POS BY MYSELF; DURING A HIGHLY COMPLEX SITUATION DUE TO TSTMS; RESTR AIRSPACE AND AN INUNDATING AMOUNT OF COORD REQUIRED DUE TO SEVERAL ACFT WITH NO FLT PLANS AND NO TRACK CTL OF THE ACFT; I REQUESTED AN L-SIDE CTLR AND A D-SIDE CTLR FOR ASSISTANCE. SHORTLY THEREAFTER; BEFORE RECEIVING HELP; THE R26 CTLR NUDGED ME TO TAKE A HDOF ON A GULFSTREAM WHO WAS ALREADY IN MY AIRSPACE WITH NO HDOF. I TOOK RADAR ON THE GULFSTREAM AND; AFTER MISSING AT LEAST HIS FIRST CHK-IN DUE TO STILL NOT HAVING ANY HELP AND MULTIPLE LAND LINE CALLS AND ACFT CALLS; I HEARD THE GULFSTREAM CHK ON OUT OF 155 CLBING TO 160. I DID A TFC SEARCH AND SAW ACFT X WITH FL190 SHOWING IN HIS DATA BLOCK AND A RADAR HIT AT 193. THINKING THAT ACFT X WAS CLBING; I CLBED GULFSTREAM TO FL190 WITH THE INTENT TO COORDINATE WITH ZJX ON THE ACFT. I THEN RECEIVED A D-SIDE AND HAD TO BRIEF HIM ON THE THINGS TO COORDINATE AND NEGLECTED TO CALL ZJX ABOUT GULFSTREAM. SHORTLY THEREAFTER I SAW THAT CONFLICT WITH ACFT X WHO HAD NOT CLBED; WAS IMMINENT AT FL190. IT APPEARED THAT ACFT X WAS TURNING L AND GULFSTREAM WAS GOING TO PASS AT LEAST 3 MI OFF ACFT X'S R SIDE. SO I JUST CALLED ZJX F10 SECTOR TO COORDINATE WHAT TO DO WITH GULFSTREAM AFTER THEY PASSED.