Vaginal discharge. I have any infection?

I have a problem with vaginal discharge. Sometimes i can find the discharge to be thick and white like cottage cheese especially when I'm near to my periods and just after the periods and sometimes creamy other times. During ovulation i can notice transparent thick discharge(not like a lubricant texture). Im sexually active for over 2+ years i cannot have sex without a lubricant. If so i feel burning sensation 7/10 times after sex. Sometimes i could see change in smell of discharge after sex. Do i have any infection? But i dont have any itching or other problems and also my periods are regular. Even if i wash ,after 10 mins whenever im up for a contact i always see discharge on my vulva and i feel so insecured for that. But at the same time i dont have over discharge also.