I'm currently BFing but we've combo fed breast and bottle (formula) from early on. Midwives and health visitors prophesied doom and gloom and nipple confusion and milk supply problems and so on but it was all completely fine, no issues at all. My supply was fine, she took both nipple and bottle happily and I'm still going at 8 months.
BFing was hard at first, they say if it hurts then you're doing it wrong but the reality is that I've never met someone it doesn't hurt for at first. I got through it with nipple shields and lots of lanolin and after a few weeks it was fine.
I'm glad I did it because it's convenient and quick compared to bottles and it's a nice bonding experience but I'm equally glad that we combo fed because being able to give her a bottle meant that I got a break and some sleep and she got some papa bonding time.
BFing is more of a challenge now because pumping at work is absolutely horrible and she has top and bottom teeth now and has started randomly biting chunks out of my nipple. She's a really enthusiastic (ie aggressive) feeder.
I've also found it impossible to lose any weight and I'm ravenously hungry all the time. The "breastfeeding makes the weight melt off" line doesn't apply to everyone - some women go the opposite way, I've actually put on weight since giving birth.
I'm winding down now and getting ready to stop BFing. It's probably the right time. She's on three square meals a day and I'm down to just the morning and night feeds which are mostly for comfort and snuggles. I'll miss it and I'm so glad we did it but it feels like time.
Whatever you decide to do is fine. Every family is different and it's about what works for you.