nearly 7 weeks and starting to regret it

i never thought i'd here myself say this but i'm actually starting to think that i have made a mistake.
i had an ecptopic removed on 2007 and had my daughter in 2008. and we have been trying for over 18 months, then days before xmas i found out i was expecting. at first we were so shocked, but pleased.
then the morning sickness kicked in, i have basically been bed bound for almost 2 weeks. i suffer from it quite badly and have been put on pills from the doc. all i do is sleep, i only just have enough energy to go to the loo!
but this has bad me realise that actually i have two children already. he has tried he best but all he does is moan. i never realised how much i do. but now i can't do anything, i've even missed another week off work. if we struggle to cope with one and i really doing the right thing??
i never thiought i would hear myself say this but isn't it quality not quantity?


thanks x