antidepressants and breastfeeding **autism TRIGGER**

I have major anxiety I worry about EVRERYTHING and OBSESS over it and always think the worst outcome of every situation which is causing me depression. I as well have a sucky mood problem lol.. I'm in a bad mood more than i am in a good mood pretty much, and get super irritated. I have a 4 yr old, and a 8 week old and it's not fair to them. I have been taking 25 mg of Zoloft for about 4 days now but it obviously hasn't kicked in yet so I'm still so nervous about taking the medication while I am breastfeeding. My baby is EBF (zero formula ) and I seen reports of it being linked to autism spectrum so of course I'm obsessing over it but not willing to give up breastfeeding but know without a doubt I need this medication. should I start taking it at night so she doesn't nurse as often to try and avoid it's peak hours? this is all prob my anxiety talking, but thoughts anyone?