Definitely Yes, you should ! You should get a trim few weeks before your wedding in the Riviera Maya.
Remember every hairstyle requires a different length. You have to consider it when you choose your hairstyle. Also heavy hair is weighted down and shapeless is brought back to life with layers. Whether you hair is short or long adding layers into your haircut will help to amp up your hairstyle possibilities.
Have a prior consultation with your hairdresser and make up artist. The more the stylist knows about what you expect, the better he can create the perfect haircut in favor of the hairstyle you choose.
If you decide to wear your hair down or an half up for your event, I will highly recommend to get a haircut to make sure you do not have any split ends and to keep a healthy hair.
If you have a bang make sure you are enough length or let it grow for few weeks. It will be easier to pin it !
Take your appointment !