Second Thoughts on my Wedding Dress

2 weekends ago I went wedding dress shopping for the first time. My wedding is not till December 2020, but I went because my grandma was in town and I wanted her to see me in a few wedding dresses before she left. I ended up loving this dress and it was also very cheap. I tried on a total of 5 dresses and decided on the 4th one. I told the lady that was helping me that I would come back in two weeks to put the deposit but then she texted me later that same day saying they had 10% off my dress so I went back and gave some money and signed a contract so I could get the 10%. I was happy and excited but then I went home and started looking at pictures of other dresses that I absolutely loved and started second guessing my dress. The dress I chose hasn't been ordered because I didn't give the full 50% deposit so I asked if maybe I could try on different dresses but I am not sure if I should just stay with the one I chose or keep looking. I am having major second thoughts, but I feel like there is nothing I can do about it anymore since I signed the contract at the bridal shop already Any advice? Should I try getting my money back or maybe looking for a new dress?