My girlfriend and I av been intimate for a while and recently I performed a really fired up cunnilingus on her.but now am stressed up on whether I av exposed myself to infections,can this happen?Was there something else that I should av used at the time some sort of protection??

You could have used a dental dam but even then it isn't l00% effective. But why are you worried if you know your girlfriend? You say you have been intimate for a while. If your girlfriend wasn't clean and STD free then I would worry if I were you.

Any sexual disease out there can be spread through oral. Some things may be less probable, but everything is possible. As in, disease can spread through the groin area, or it could be in a partner's mouth.

Female condoms are always an option. There's nothing wrong with being safe.

[edit] STD risk
Chlamydia, human papillomavirus (HPV), gonorrhea, herpes, hepatitis (multiple strains), and other sexually transmitted diseases (STDs) — including HIV — can be transmitted through oral sex.[5] While the risk of transmitting HIV through cunnilingus is unknown, it is suspected to be fairly rare. Any kind of direct contact with body fluids of a person infected with HIV (the virus that causes AIDS) poses a risk of infection. The risk from most of these types of infection, however, is generally considered far lower than that associated with vaginal or anal sex.

If the receiving partner has wounds or open sores on their genitals, or if the giving partner has wounds or open sores on or in their mouth, or bleeding gums, this poses an increased risk of STD transmission. Brushing the teeth, flossing, undergoing dental work, or eating crunchy foods such as potato crisps relatively soon before or after performing cunnilingus can also increase the risk of transmission, because all of these activities can cause small scratches in the lining of the mouth. These wounds, even when they are microscopic, increase the chances of contracting STDs that can be transmitted orally under these conditions. Such contact can also lead to more mundane infections from common bacteria and viruses found in, around and secreted from the genital regions.


[edit] HPV and oral cancer risk
In 2005, a research study at the College of Malmö in Sweden suggested that performing unprotected oral sex on a person infected with HPV might increase the risk of oral cancer . The study found that 36 percent of the cancer patients had HPV compared to only 1 percent of the healthy control group. [6]

Another recent study suggests a correlation between oral sex and throat cancer. It is believed that this is due to the transmission of human papillomavirus or (HPV) because this virus has been implicated in the majority of cervical cancers. The study concludes that people who had one to five oral sex partners in their lifetime had approximately a doubled risk of throat cancer compared with those who never engaged in this activity and those with more than five oral-sex partners had a 250% increased risk.[7]


[edit] Prevention
Due to disease risks, many medical professionals advise the use of dental dams when performing or receiving cunnilingus with a partner whose STD status is unknown. A makeshift dental dam can be made of a condom (instructions). Using a real dental dam is preferable, because real dental dams are larger, and the makeshift version may be accidentally poked with the scissors during the cutting procedure. Plastic wrap may also be used, but this is less preferable because the thickness dulls sensation. Certain kinds of plastic wrap are manufactured with tiny holes to allow venting during microwaving, which may allow transmission of pathogens.

Source : Wikipedia

Yes... about the only thing that's not likely to be passed that way is H.I.V. not impossible just not likely. Everything else you can get down there you can get up there as well.