did you get a bristle nose pleco? I would say do not get one! IMO, you have enough lower level friends... Cory's and shrimp. also the pleco would not do well in your set up... I think you should hold off on getting more fish for now although ..
do you know the sex of that sword that you got? in my experience swords do best in a trio of 1male 2 females... otherwise females get lonely (sometimes sick and die from it) and males get mean and territorial... also I would say don't get any more shrimp because they will bread. then you will be in the position so many of us have found ourselves .. to much stock and not enough tank. that's how I got where I am... started with a 10g - 4 years ago... I now have a 60g, 29g, 2-10g, and 1g (shrimp project in process)