Relationship Issues

my boyfriend and I were together for 5 years and we broke up in December, recently we have been trying to get back together and he says he has a right to know what Ive done (with other men) during our time apart. Well here’s the thing, Ive only texted a few guys some as friends some tried to get with me but i never met with them or anything just text and that didn’t last but like I dont even remember the conversations and he is going to ask and if I tell him I dont remember them he is going to get mad and swear I am lying but I swear, between juggling 2 kids under 2 and trying to find myself with absolutely no breaks, i literally cannot remember the conversations like not even how 1 went besides maybe imessage games 😂 like wth do i do?