Leaving my 7 month old

Okay so I've been looking at taking a trip to Florida for 3 days on January 30th till the 2nd of February. She'll be 7 months on the 13th of February. I live in canada now so I'll be far away for a little while. I want to leave my little one with my husband but he says he doesn't feel comfortable which is quite disheartening because Im here everyday all day with her I pay the majority of the bills and grocerys with my savings since he started a new job and isn't making money really. I would be paying for the trip with my money and I feel like I need a vacation :I if I slowly start leaving her for days at a time with her dad now the. She will be used to it while I'm gone. I'm of course going to have my phone and I'll set it up to revive calls and I have enough money to fly back early if anything went wrong god forbid. And there's also my  dad to take care of her if my husband gets overwhelmed. Is it selfish of me to want to go wih my sister to Florida for only three days?