Is baby sleeping too much

[Lovelybaba]

So my baby is 11 weeks old and has started to sleep through the night atleast 10+hrs and not waking for a feed... Is that too long

As long as weight gain is okay make the most of it!

Well that's the thing, she's been suffering with reflux lately and has slightly dropped off her weight line, hv wasn't too concerned as we have gone to gp to try and monitor it.
So I don't know what to do for the best as I tried to feed her last night and she just threw it all back up!