Hi Sonnya every level has its problems and I hope the frustrations not too bad. I would suggest a couple of things to go along with some of the suggestions already made. The slow things down and break into smaller parts are good advice. I would counting the beats if you don't already. I know its a bit boring and naff but counting one, two, three, four or just three depending gives you a base to work from. Buy a cheap metronome they help a lot with tightening up your timing. Most songs are on cd and if you use an electronic tuner you will be in tune with a cd once you know what chords they're playing and then play along with the song.
You don't say if you're singing along while playing but if you are then don't sing for a while but concentrate just on what you want to play and when that becomes a bit more established add your singing back in.
Hope this is helpful.
Nige 
Pages 1