Hi,
Welcome to health care magic,
Vaginal burning sensations after a sexual intercourse could have many reason but it should be properly examined by the doctor to arrive at a certain conclution.
It could be due to
dermatitis of vulva or vulvo-
vaginitis or thrush or rarely
vulvovaginal candidiasis which you are also suspecting.
You can go for clinical examination by
dermatologist and swab tests for microscopic examination of the vaginal part.
Meanwhile,you may take below mentioned symptomatic treatment for temporary relief.
1) moisturizer creams or
2) lubricants KY gelly before sex,
3) use cool compression,
4) wash genital regularly using sorbolene cream instead of soap.
5) Avoid using talcum powder,irritant soaps,bath oils etc.
If problem persists then consult skin specialist and gynecologist for which
oral pills to be used alternatively.
Regards,