Apple

My phone suddenly chooses when it wants to charge, I’ll plug it in and it will charge only sometimes. I cleaned out the charging port gently without damaging it, and I even bought a new cord and block, and all the chargers I’ve used work fine with my friends’ iPhones but not mine. Is anyone having an issue with this or is there a solution to this problem? Please don’t be too mean, I’m going to go to the Apple Store soon when I can afford it. Thanks for any advice 🙏