go see a lactation consultant right away. I ended up with a yeast infection from babies mouth on my nipples and it was torture! Did your baby get antibiotics after the tongue clip? This makes mouth thrush (yeast infection) really common and it can be transferred to you. It has to be treated with medicine. Does baby have white thrush in the mouth? But nipple pain is pretty common no matter what in those first few weeks. Formula at night will ruin you milk supply and your body will stop making what the baby needs. So if you do need to use the bottle, then you need to also pump even at night for the sake of your milk supply.
The only way to do this is to have someone help you at night. Can husband give the baby expressed milk or formula while you pump? If you don't have a supportive partner who gets up at night with you, you are likely on what I came to feel was my "sinking ship of breast milk supply and failure". Switching to the bottle is your choice and I cast no judgment. I have both succeeded and failed at BF. I have "sucked it up" through pain and I have thrown in the towel.
Maybe this is just me, but I was not able to get over the grief and guilt I carried having failed to BF my first. So from that perspective, I urge you to "suck it up" for the first month because the first month is damn hard. I wish you the best. Hang in there, but more than that, get some help and support to help your odds of success. If for your sanity, you need to give up BF, then do it. But make sure you have tried all you can or you may really regret it. Welcome to motherhood (and the mom guilt that comes along with it).
(I cannot stress enough, in these first weeks, you need to feed or pump 8 times in 24 hours or more or your milk supply will dwindle and you will not last long at BF. Sorry its so hard. But for some of us , its just really hard. I sat next to a gal at the lactation office and she confessed that BF was the hardest thing she had ever done. I asked her what she did, and she said she was a medical doctor. I said, "so bf was harder than your medical residency?" She thought for a moment and said, "yes.")
http://kellymom.com (here is a great BF resource)
Hang in there mama. Its hard! But if you are able to recruit support, especially night time support and professional help, your chances of succeeding will be really good.
If succeeding at BF just does't seem as important as your sanity, then you will likely have a perfectly healthy formula fed baby.