Actually, it doesn't itch and doesn't have a very strong smell, but it smells like menstruation, just without color and a much weaker smell.

From what you're describing, it could be normal vaginal discharge. Like, it's super common to have a discharge that smells like menstruation, but weaker and colorless, especially close to your actual period or when your hormones are going wild, like during puberty. It's just your body cleaning itself, you know?

What is this discharge?

It's like a natural liquid that the body produces to keep the vagina clean and healthy. It can change color, smell, and consistency throughout the month, depending on the phase of your cycle. If it doesn't itch, burn, have a SUPER strong and bad smell (like rotten fish), and isn't green, yellow, or gray, it's probably fine.