Am I a bad mother?

Am I a bad mother for considering formula for my second born? I breastfed my first but I couldnt pump at all so I literally got no breaks and as a 19 year old new mom, it took a toll on my mental health. I'm now 23 and 22 weeks pregnant. I'm thinking of formula so my husband can help. Or thinking about mixing formula and breastmilk in the same bottle. Idk. I saw a mom on my FB shame forumla feeding moms, calling them lazy.