Should i get a back up dress?

A few things here...providing a backstory for clarity. Sorry if this gets long! So when I was 25, I was engaged before and my mom and I jumped the gun and purchased a dress from David’s Bridal. Dumb, I know. 😅 We did it before a date was set, and long story short...that engagement crumbled.

The dress is a size 4, and I was around 120-130lbs at that time. It’s hard for me to remember. No idea what my measurements were at that time. I was hoping to wear it at my wedding. Well, now I’m 31 (I’ll be 32 when I get married) and my body has changed. I’m currently around 140-145 and trying really hard to tone up. My wedding is just under 10 months from now. I’m pretty sure I can reach my body goals by then but I’m still really concerned about the fit of the dress, and also not being able to lose enough fat to fit it. The dress wasn’t taken in at all, only alterations were hemming for length since I’m short (5’2”). I can make my waist smaller but no too much I can do about my hips as they have just widened with age. I know wedding dresses run small usually.

Unfortunately, I can’t try on the dress because it’s at my mom’s house. She lives two hours away and I just haven’t got a chance to get there and pick it up. I’ve been so nervous about doing that anyway because I have a good feeling it won’t fit, and that will just stress me out more.

So, with all that being said, should I purchase a back up dress in case this one doesn’t fit? I found one on Lulu’s that I absolutely love and it’s only $110. It also looks similar to my original dress. I plan to dress it up with a belt if I end up getting it.

What at do you guys think? Currently, I am 5’2” 142lbs, 32B, 31 in waist, & 38in hips. Top photo is the original dress, and bottom photo is the dress I am thinking of purchasing from Lulu's.