Oh the guilt

The DHS office must be short on foster parents. They have called me twice in the past 2 weeks. I feel so guilty, but had to say no to both placements. I have 3 girls 2 and 1/2 yrs old and younger plus one on the way. I just feel like I would be doing an injustice to the kids I already have and to my unborn baby to add any more stress. But I think the guilt is killing me more! I want to just take in all the little kids and save them all. I know I can't do that. I know.........