i did many transplantations in flower and most were very successful, but you need just stop giving any food and put on plain water diet till chop, that will bring better result than any other actions.
In future remember - less is more in growing. In soil you start to feed except root stimulants or bacterias on week 4, rare earlier ... Buy good mix ( solid brand and have a grow ), before planing to do your own, but if you plan, have a look at this
www.youtube.com/watch
he made few recent videos about it, check the channel