I have this slight burn in my penis which i've had for the past two days. it can't be an sti cause i haven't been sexually active for the past 2months. what could it be and what can i take for it.

Prob not STD, but...: If the burning is when urinating, and/or if there is discharge (maybe noticed only in the morning or from stains in underwear), it could still be an STD even after 2 months. But you are right that penile pain without discharge or painful urination is not an STD symptom. Maybe irritation from minor trauma (e.g. vigorous masturbation)? Prob not serious, but get care if it persists more than a week.