my boyfriend hasn’t responded to me for 3 days

My boyfriend has been having a tough time mentally but has been talking to me every day and FaceTiming/calling me every day until this Saturday when he suddenly stopped responding and hasn’t responded since. My messages won’t deliver either (it’s possible he blocked me but I don’t think so) and I have tried adding his Snapchat and messaging his Facebook but nothing. His mom keeps a close eye on him because of his mental state so I’m assuming if something was wrong she would let me know. Should I be worried or just give him space?