Do I have a speech impediment or an accent?

Having difficulty pronouncing words which are not a challenge to other people is a sign that something isn't right. There are a couple of choices open to you. One is to consult a speech therapist and find out if that person could help you. Speech therapists help with speech problems which result from medical problems, genetic problems, or other sources. Another possibility is to visit a speech communication instructor at a community college. There might be a course at the college which would be of use to you, and it would be cheaper than seeing a therapist. You might also search for self help materials, such as books, CD's and tapes at online bookstores under the heading "speech therapy." There is also the choice of doing absolutely nothing. As long as other people are able to understand you, you're not doing anything wrong. And remember, unless you are making glaring grammar errors, there is no such thing as "talking correctly." The U.S. is a patchwork of different accents and speech patterns, and they are all "perfectly correct" for the area where they are used. Come on down to east Texas. We'll ask ya if y'all'd lak som flapjacks. And see what happens to anyone who says we aren't "talking correctly." But it's your life, and if it really bothers you, there are choices available to you.