I am a single mom of 3, a 6 year old 2 year old and a 1 year old

I swear some days I just feel like I'm just cant do it no more that I just want to crawl in bed and cry and I feel I try and I try so hard and my oldest is so difficult yes he is in therapy. Covid has made it hard with therapy and school on zoom. Before I kick out his dad due to drugs I feel therapy was working now 2 months after feel back to square one

I'm just sitting on my couch watching the babies play trying not to cry.