The exposures you are concerned about are zero risk. Kissing is no risk, even deep kissing and even with canker sores, gum or dental disease. Similarly. there is no risk from the possible transfer of her vaginal secretions from her vagina to your both on your finger. Even if vaginal secretions were transferred, the quoted figure for HIV risk, if one has oral sex with an infected partner is less than 1 in 10,000 and, in my estimation that is too high. Some experts state there is no risk at all from oral sex. Neither of us on this site have ever seen or reading the medical literature of a convincing instance in which HIV was passed by oral sex. Your exposure was even lower risk than this.
there is no risk, therefore there is no medical reason for you to seek testing. I hope these comments help - you have nothing to worry about. EWH