I Need Alot Of Help

Hi my name is shawnece, I have just found out that my dad is dieing and he wants me and my boyfriend to get married now instead of next year, so to make a long story short I have 3 months to plan a wedding and only a 1000 dollors to do so. The only thing that I have already planned is the location( I got that for free from a friend) and I think that I am going to get my dress from davids bridal`s 99 dollor sale. Oh ya I also have the theme it will be a beach theme. So if you know anything that could help me please, please let me know.
Thanks alot
Young bride,18