It's been three months since Rebecca Lim gave birth to her daughter, and some days are tougher than others. The Singaporean actress, who also has a two-year-old son with husband Matthew Webster, shared her struggles in an Instagram post on Sept 2. "I am so grateful for my village and so incredibly thankful for my babies. But there are days when it hasn't been easy," she remarked. Rebecca, who turns 39 later this month, said she mostly struggles with how she looks in the mirror and "despises" herself for the feelings that come up when she does. "I know that there's more to life than that, but I'm only human. And the pressure to bounce…