My son went from 75th centile to 2nd centile (91st for height so very very skinny at 2nd centile) over 8 weeks of breastfeeding. HV, midwives, doctors, lactation consultants, all said nothing was wrong and I just need to keep peresevering, feeding on demand, and topping up with pumping. 'Demand' was LITERALLY about 22 hours a day.... when exactly was I meant to pump? I did whenever I could, but nothing much came out.
Anyway. Eventually he got diagnosed with a 90% thick posterior tongue tie at 8 weeks, and got it snipped soon after, but by that point my supply was awful and he'd had 8 weeks of not getting what he'd been trying so hard for. HIs latch was perfect and I had no pain, luckily. But, we combo fed for another 2 months before completely cutting out BF at 4 months, as he wasn't getting any benefit from it. All his nutrients was coming from the formula.
If I hadn't listened to all the 'breast is best, you must keep trying' advice, I would have had a much healthier baby.
SO! I'm not prepared to put this next baby through what was basically starvation, soooooo if things start to go south with BF this time, I won't listen to all the pros and will have no hesitation to switch to formula.
I have a friend who never tried BF, she simply didn't want to. Fine by me!