Combination feeding

[TK1930]

Hi
I would like some advice please. My Dd is 20 weeks & Has been ebf up I until now. I have now decided to combination feed her due to various issues- surgery, mastitis and she could do with putting on a (little)bit more weight. For the past week I have been giving her a bottle before bed & for the last few days a bottle at the 11am/12noon feed.
Is this sustainable or will my supply go? I really want to keep up breastfeeding for the rest of the time.
Any advice would be much appreciated,
Thanks

How much is she feeding overnight? The 10pm-10am feeds always seemed to make more difference to my supply at that stage.

She's been up twice during the night recently, though usually it's only once (about 4am)
At the moment I feed approx 1am 5am 8am

This is one of those questions that is just impossible to answer as everyone is so different. I did one bottle a day (11pm) from this age with no problems - my sister did bottles all day and breast at night fine - another friend started doing two bottles and that was the end of breastfeeding for her.