Itching at night and spotting

It's been like two weeks that have been noticing itching on my bikini area, specially at night. And also spotting (my period is supposed to come in like 9-13 days or so).

I notice that it started happening after hair started growing after shaving it. As soon as it grows again, it starts itching enough for me to wake up at night and having problems to go back to sleep because its uncomfortable.

I dont think this is just about hair growth anymore. I want to add that i've had sex with my boyfriend once each week. He is the only sexual partner i've had. Its been years. Im the only sexualy partner he has had as well.

Could it be something about his body provoked an infection? Or..idk..

Im planning to see a doctor soon but i still would like to have an idea now of what the heck is going on down there.

What do you guys think?