You shouldn't normally ask, "Do you remember me?" It's too aggressive. They will show that they know you by their voice and attitude.
If they can't remember who you are, start by describing where you were when you met each other. (E.g. "We met at a party on Wednesday." or "We go to the same art class.") Then, if you need to, describe yourself in more detail. ("I was wearing an orange hat." "I'm the tall man who sits at the front.")
Here's an example of an informal conversation in British English:
Bob: It's me!
Anne: Er... I'm not sure I....
Bob: It's Bob! We met at the nightclub on Saturday. I was the guy who helped you find your mobile phone.
Anne: Oh! Hi, Bob!
By the way, the it in It's me! and It's Bob! has no meaning. Bob said "it" because every sentence in English needs a subject.