Sick of DDs arguing and of being a rubbish mum please help!

[Lovestosing]

I'll try to keep this brief, I have 3 DCs aged 6.3, 4.8 and 2.8. My two DDs 4 and 2 seem to argue constantly. I hoped it would improve in September when DD1 started school but it has actually got worse, I think she wants more attention because she's been way from me and unfortunately DD2 turns into a very demanding Velcro toddler the minute we pick the others up from school. It is beginning to really get me down.
I am not dealing with it well either as I have never been the calmest person and for 5 months now I have suffered with horrendous headaches (not migraines) which I'm having scans and tests for so most of the time I'm in pain and I'm even worse at keeping my temper. I don't smack but I end up shouting a lot more than I want to and I feel so bad about it. I'm a SAHM but I have been thinking about going back to work a lot lately as I think the children would be better off without seeing me so much. Does anyone have any suggestions?

[Lovestosing]

Well that wasn't exactly brief but anyway does anyone have any ideas on how to deal with my DDs?

[3plus2]

Oh I know how you feel! I have 3 dd's 7 and 5 and a few months of course it's the 7 and 5 year olds ! They bicker over everything ! Even who sits next to me. , who has done this , she got my toy , mum she did this mum she did that its awful and I get angry sometimes too and result in shouting. Tbh the only thing I do is (your 2 year old may be too young) is to tell them they will loose 10 mins off there bed time if it carries on although this doesn't always work it's so hard so I know exactly what you are going through but I think all children argue and bicker. And you have a lot on your mind which makes you snappy as ur probably thinking things through and can't concentrate it's so difficult. I'm sure someone will give you some ideas and I will be watching too :)