Pregnant after plan B

I need this out. I can’t sleep. So I just got a positive test just now. I’m not okay. I wasn’t on birth control due to some issues which has been resolved now so I had made an app on Nov. 2 to get on birth controls so meanwhile used protection, well we had sex right after prob 3 hrs later I took Plan B. My stupid self thinking that would work I never thought I would be pregnant so soon AGAIN. I had flare ups this past 2 weeks I thought I was sick again so I went to the doctor & was put on some strong medication to take again, well I noticed my period didn’t come it’s been 5 days today & so I was like “there’s no way” so I stopped the pills they gave me right away (I have been taking them for a week), took the test & POSITIVE, now I can’t get over all those symptoms was prob the baby & now i can’t stop thinking how it could affect the baby since it does say on the medication that it “could harm a baby if pregnant”. Secondly I just had 2 babies back to back. My oldest just turned 4, my middle child is 19 months (March 2020) & my February baby, I’m already struggling with it all & I can’t think of how I’m going to do it with all 4. I feel like I failed my kids. My husband & I hadn’t had sex since i was pregnant of my February baby. I was scared due to me being sick & when I finally felt better & was okay to have sex I get pregnant. I know it’s my fault. I know I’m stupid. I just needed to tell someone & im scared my body has recovered completely at all & im scared for ppl reaction again the judgments which I know I don’t ask anyone anything but idk, I’m scared that now I won’t have time for my kids. I barely get any help my husband works almost all day. I do everything on my own. Idk how am I going to do it? I’ve jokingly have said that if I ever become pregnant so soon again I’ll abort but I can’t do it I know I wouldn’t be able to. I need prayers for what’s coming for me, please please pray for me. I’m not much of a prayer but hopefully God can give me strength & patience for what’s coming bc I’m really scared..

I’m sorry this is long I needed it out. Thanks for anyone who’ read this all the way to the end. Have a good night & stay safe.