Sleep help

My 10 week old will not sleep for more than 20-30 min at a time. He wakes up out of that first sleep cycle like clock work. I’m exhausted. At night he startles constantly and is awake several hours a night. He only sleeps if I hold him, and I’m not comfortable doing that at night. He is showing signs of rolling early so a swaddle is no longer a safe option. Hubby has a high stress job and sleeps in the other room (we both made that decision together so no judgement plz). I’m wiped out. I feel guilty for wanting some time to myself. I spend my entire day trying to get baby to sleep. He only sleeps if I hold him or if he is in the baby carrier when I wear him.

How do I help lengthen his naps???? I could deal with the night times if I could just have an hour or so here and there during the days to nap, rest, or just get some chores done. Any tips? We are trying the Zipadee Zip swaddle transition tonight to see if it helps at all.