I would say she sounds pretty normal in terms of sleep periods - babies tummies are so tiny that they need regular refills at this stage and though some people are lucky to have sleepier babies who go longer I think they are more the exception than the rule when I look around at the babies I've known! I don't know how she is fed and my own experience with my children has been breastfeeding so I can't really comment of what is normal for a bottle fed baby. You must be pretty exhausted with the reflux - especially if you are doing some breastfeeding, but even if you aren't I know (only secondhand as my niece had it) how incredibly time consuming and demoralising it can be. I think the longer sleeps are really just a matter of tummy size - as she grows her tummy will hold more and she will go longer. I know that doesn't offer any easy answers for now but (after 4 of my own) I'm not convinced there are any and I think a lot of new parents are, yes really tired, but also really stressed by the idea that they are doing something wrong because their baby isn't sleeping all night. Sadly health visitors are often pretty unhelpful and seem to expect all babies to sleep through at 12 weeks which is crazy. This early time is really exhausting but it does pass and meanwhile you are giving her everything she needs - she is fed, loved, she sleeps, she gets cuddles. Even in 1 years time she will so much more independent of you, playing with her toys, finger feeding etc - you will never have the chance again to do so much for her and while it might drive you crazy now, believe it or not you might miss it when it is over! My only tip is to try and get a nap when she does - even if it means the house is a tip and you get no housework done - it wont be for long and it is worth it to look after your own health and wellbeing. I hope this doesn't sound smug - I have struggled with the early days with every baby and only with the last one did I get the sense of perspective to tell me it would be over soon. I know how swamped you can feel in the middle of things, especially with a complication like reflux making it harder work. All the best to you.