loss of libido : no sex life

So recently I've had a baby (9weeks ago) 
Me and my partner argue a lot mostly me losing my temper which can be over petty stuff but can also just be a build up .. anyway!! He doesn't understand why I near enough never want sex anymore ! Why would I want sex with someone I'm constantly pissed off at I love him dearly but my hormones are still everywhere and I just don't want him inside me at the moment lucky if we have it once a fortnight .. 9/10 I just wait till he's at work at do the job myself ! 
Anyone else experienced this??