Bright neon yellow urine, lower abdo pain, pressure in vagina, sore during intercourse, drinking 2-3ltrs water per day, cud i have a kidney infection?

Need urinalysis: With your set of symptoms, it sounds like you already know what you've got. May be a UTI or an STD. Or rarely, something else. You should go to your primary care physician or an urgent care to get a urinalysis; that is the place to start. Common things are common, so you likely have a condition easily treatable with antibiotics.