first of all - you aren't a good mum, you are a GREAT mum

breastfeeding is hard and exhausting and there is a lot of pressure on mum's to do it. Its a complete shock to the system having a baby the first time and then being wholely responsible for feeding this tiny little creature is so daunting!

I don't want to sound cliche but it does get better!

My first BF experience was horrible and I did switch to formula and did feel guilty but then found that I bonded so much better with my little baby after switching, second time around I found it a lot easier

Try setting small goals for yourself. This is the way I successfully breastfed my DD2 for 12 months, I started out by telling myself, aim for 6 weeks, which I did, then 4months, 6months etc..........

In the end a happy baby and a happy mum is the most important thing and if you feel at all guilty please try not to or at least talk to some supportive people (IRL is better because there are quite a few around online you are so pro BFing its really quite hard)