I burn really easily too but I still put on a ton of sunscreen and you will still get tan just slower. Need to get basecoat. Don't stop wearing sunscreen. wrinkles skin cancer dry leathery skin. Yuck. Just work at it gradually.
To make the burning sensation in your skin, you need to avoid and stop with immediate effect using cosmetics with Mercury. Mercury erodes the skins melanin making the skin inner layers exposed hence the itchy feeling.