2.5 months difference!

I am 10 months postpartum and I’ve been busting my butt for the past 2.5 months to get myself to even better shape than I was before. Today I finally woke up feeling so proud at how noticeable my progress is and how strong I feel! The only thing.... I usually carry my daughter on my left side as I’m right handed and if you check out my arms, you see how my left arm is much skinnier than my right. Any tips on getting them to be the same size would be greatly appreciated 😂😬