I would definitely recommend going to see your regular doctor
about this issue. They will be able to examine you and help figure out what is going on.
One possibility here is that this might be a case of pubic lice (commonly known as "crabs"). Pubic lice cause this kind of intense itching in the area of the pubic hair, and they can be passed from one individual to another, usually during sexual intercourse. Pubic lice can usually be easily diagnosed by your doctor by closely examining the affected area, and there are excellent medications which can be used to get rid of the infection.
Other common causes of itching would including an allergic reaction to something, such as a soap or lotion that you might be using. Similarly, minor bacterial infections of the hair shafts, called folliculitis, or ingrown hairs are other common causes of red bumps and itching, especially in those who shave the pubic hair. Most of these conditions are treated simply with good skin care and, occasionally, topical medications to relieve itching, inflammation, or infection.
A sexually transmitted infection is less likely to cause these kinds of symptoms, but when you go to see your doctor I am certain they will ask questions to make sure this is not what is going on.