transmission can occur only when body fluids come in contact.
Body fluids like semen, blood, milk and vaginal secretions will have the high viral load
Usually mouth is inhospitable for HIV virus, so saliva is relatively safe for HIV.
You also havent explained anything about breast milk, so i assume she is non lactating. and from your description there is no real contact from vaginal secretions and your blood( since your finger is non bleeding)
There is almost nil possiblity of you being infected by HIV.
If your from INDIA (i think you are) there are many government VCTC counselling
centers to clarify your doubt and they can also do an ELISA
test for HIV if your not satisfied. Your information will be kept secret in those centers