hello, earthlovers123
i am also not american. i came to usa 10 years ago. i was straggled with my english at first even if i had learned it in h.s. i was scared to speak because i thought that others will laught at me because of my accent, wordspelling, all others. i started to watch tv or even just listen to how they are talking, i listen to radio, i read lots of newspapers and books, and go to school for nursing assistant after being here about a year. and first my work was in nursing facility where i have no one to speak my language so it was big step for me to break myself and start talking, talking, talking.
i also recommend if you could talk to someone who speak english or even your friends but just using english for about 30 minutes to an hour and i can sure you will feel deference after while. besides, remember that some instructors are just pitty about english because they think that we as foreign students are not capable to do it, to go throught school, or work. i was also in that situation not long ago, and i just ignore what they say because i know that i am capable and nothing is there to stop me. my patients understand me and if that is the case i try to use words that are not too complicated. going throught nursing school is rough time and lots of sacrifies but if you know, just like i do, that you want it do it and be happy.
good luck, i hope this helps,

by the way my husband is filipino, i am polish. and your ehglish is very good. keep up there!!!