There is a whole lot you can do, just depends on what you may be interested in.
The Federal Reserve is one of the top options for people who just have an Economics BS/BA, definitely apply there if you live anywhere near one of the 13 locations.
You could always take the CPA exam and try to get into Big 4 Accounting (though you missed out on a lot of internships), or you can try and get into iBanking as an Analyst or an Associate.
BigGov has a whole lot of Economist jobs in general, especially the Department of Treasury.
I'd definitely recommend grad school though, aim for the top schools and look at Economics MS programs as well as MS/MBA programs, which usually aren't more than a year longer, and offer you a myriad of new options for career.