What Does Burning And Pink Discharge After Having Sex Suggest?

I,am 54 year, had viginal bleeding about two months back, i infomed my doctor ,my endometrium siz was 7 mm,afte bioopsy my report was negative.had smear test, it has little infection,my doctor asked me to inser ,elbothyl suppositries for a week ,this test has to be repeated after six montha, now my problem is ,feeling burning, after intercourse,and there is pik dischrge,not blood! I am worried why it is happening to me!we are not very active in sex once in year sometimes after some months! Pls guide me sir! Thank you!