I don't like the term "slut phase" because it's presuming that women aren't allowed to be sexual but for one point in their life.
In any aspect I never really had a phase where I was super hyper sexual except for right after I had my first great orgasm from sex. I fukked my boyfriend all day and night. I'm also pretty open-minded in general about sex so.... I dunno if I'm what you consider slutty. Plenty of men tell me I don't have sex enough, plenty of men tell me I should only have sex with one man and never again. Most men who are worth their salt, I've found, don't give a flying fukk.
To me the term slut is the same as what you'd call a freak. And I only get freaky with boyfriends.