@dagmaraka,
Other types of infections you may have had are most likely unrelated to the current cold sore infection.
The following medical info is excerpted from:
http://www.animated-teeth.com/cold_sores/t1_cold_sores.htm
Cold sores are caused by the herpes simplex virus. There are actually two types of herpes simplex virus, "type 1" and "type 2."
Type 1 herpes simplex virus.
Herpes simplex virus type 1 ("HSV1") generally only infects those body tissues that lie "above the waistline" and it is HSV1 that causes cold sores in
the majority of cases.
Type 2 herpes simplex virus.
Herpes simplex virus type 2 ("HSV2") usually only infects those body tissues that lie "below the waistline" and it is this virus that is also known as "genital herpes." Herpes simplex virus type 2 is not usually the virus that causes cold sores, although it can.
When you think of having an infection you usually assume that you were recently exposed to the germ that has caused your problem. With cold sores this is not the case. Cold sores are not a sign of a recently acquired herpes simplex infection but instead a reactivation of herpes virus particles already living in your body. Cold sores occur when latent herpes simplex virus particles, which have been lying dormant ("asleep"), become reactivated.
The dormant virus particles come from a previous herpes infection. A person's initial herpes simplex virus infection, termed "primary herpetic stomatitis," does not usually take the form of a cold sore and therefore a person may not relate their initial exposure to the herpes virus to the recurrent cold sores that they get.
Each of the following items has been found to be an event that is often associated with the formation of cold sores. Many of these factors seem to correlate with time periods when a person's immune system would be expected to be weakened or stressed. If compromised, a person's immune system, which under normal circumstances would be able to keep the herpes virus particles in check, can be overwhelmed and a window of opportunity for cold sore formation can be opened.
Emotional upset and stress.
Physical stress and fatigue.
Illnesses (including a cold or the flu).
Injury to the lips or skin, such as physical trauma or severe chapping.
Injury to the lips from excessive exposure to bright sunlight or ultraviolet lamps.
Menstruation or pregnancy.
An immune system deficiency.