700+ likes in one engagement round (Its a Problem!!!)

i just finshed one round on engagement group and received over 700 likes
and its kind a problem for me because my followers are droped in 2 ( i quess they think i bought likes orsomething) but its looks fishy
any recommend what can i do now? how i get make it looks unfishy, its all kinda organic no bots or something, but still all my posts on 90-150 likes and my last one is 700+
what would you do? :O