if I dont get an internship will I be in trouble when it comes to getting a job in the future?

Internships are indeed helpful when it comes to finding your first professional job, but getting an internship is not a make or break scenario for your career. If it was, the majority of college students would never find work.

Adding to the list of potential volunteer places given by Mamawisdom, I would advise visiting local anti-poverty quasi-legal groups. I did volunteer work for one such group while in college. I wound up in the basement of the state capitol building going through real estate tax records (long before computerization). The data revealed unjustly favorable treatment of coal companies by local tax assessors, to the detriment of local school boards.

The short answer is yes, a bit. I would STRONGLY encourage you to look at doing any type of volunteering or internship close to home if you can. Yes, a lot of internships are in DC, but every state, county, and city has government offices and every national agency has regional offices and every DC politician comes from a district --including the one where you live or go to school. Aim lower. Thing outside the box a little. Be proud that you are paying for college and understand you aren't the only one who can't afford to live in DC for a a couple of months with no income.

The key aspects of an internship are to get some real exposure to what people do and to make connections with people who might hire you are help you find a job after graduation. Anything you can do this summer -- working on a local political campaign -- and more importantly next summer will be helpful to you. If you can't it doesn't mean you won't get a job. It is just easier if you've had that experience and developed a network.