Oeisha, how you doing? Hope you've got some relief from the mastitis. And make sure you get all the help you can from all sources regarding how you're feeling. Is your DH home at the weekend? Get him to pamper you and do loads of baby stuff so you can get some head space.
OK guys, some feeding qu's.
How often is too often for LO to be feeding during the day? I wasn't too worried - she's feeding about 10-15 mins once every 1.5-2.5 hrs (that's counting from feed start to feed start, not from feed end to feed start), but she has a long break in the late evening/early night (last night 6 hrs, from 9.30 pm-3.30 am 
, but usually about 4-4.5 hrs) so I was kind of thinking she has to make up for it during the day, but my wise DM is doing her usual guilt trip thing on me (i.e. less than 3 hrs is too often), and the truth is she doesn't always feed very calmly. But I can't keep her awake once she's had enough, or even if she's awake she won't open her mouth if she doesn't want any more.
And another one: having said that Iwould not be expressing, a gig has turned up that I really want to sing in (in a club, so too late in the evening for DM to take the girls for a walk close to the venue while I'm singing, she'll have to stay at home with them), and DM is here and only too eager to give LO a bottle, so I have started expressing some milk. How much does a BF baby need for 1 or 2 feeds? I have 4 oz atm and am expressing about 2 oz every morning. Hoping she'll take the bottle (she takes a dummy no problem). Advice please!