Dream honeymoon!

Me and the love of my life are getting married next fall. I want to surprise him with an early 2018 honeymoon! Between January to March roughly. One of those months. I am so excited. I have roughly $5000 to spend. What should I do!? I have no idea what to do and I want it to be really romantic! I'm 13 weeks pregnant so that's why I want to wait until early 2018 so I can bond with the baby and it won't be as bad to leave for a week or so. Any ideas are welcome!!! Thanks everyone :)