Feeling guilty....

So I am currently 6 weeks and 6 days pregnant. And I honestly do not want this baby. I have a 10 month old already and an unsupportive husband who acts like a fucking immature teenager... Plus I have a full time job and another grown ass teenage man living at my house who doesn't do a damn thing. I can ask them to do something as simple as fixing a bottle and they complain. They don't pick up after themselves and bitch because the house is a mess... I was taking birthcontrol but it failed. I got a cold they gave me antibiotics and now I am pregnant... I feel bad because I don't want this baby. I feel like my little is to complicated and another baby will add more unneeded stress. My husband doesn't know how to save money nor does he take responaibilty in saving money. I make sure all the bills are paid on time. I make sure we have everything we need at the house. I DO EVERYTHING! I feel like a horrible person because I don't want this baby.... But hell I'm already taking care of 3!