You know there will be people being saved during the tribulation, don't you/ The Holy Spirit will be here, on earth during the tribulaion. Want scripture?
(Jn.14:16), (Acts 2:16-21), (Rev. 12:17 with 19:10), (Zech.12:10, 13:1).
Multitudes will be saved bythe Holy Sirit during the tribulation, as now (Acts 2:16-21), (Rev. 6:9-11, 7:1-21, 12:5,17, 15:2-4,20:4-6).