UK universal credit help

Hi so I'm closing down my universal credit claim tomorrow ( basically jobseekers) to take up a two year college course ( I'm 18 and had to go on UC when I dropped out of college December else my mum would have kicked me out) and I'm just wondering because I get paid on the 15th of every month will I get one last payment September 15th if I close my claim tomorrow ? and will they be mad or whatever because I've decided to go back into college ?