LO twitches and wakes up..help what do I do?

YSMom

My LO will be 7 weeks tomorrow, she sleeps very little during the day time and at night we swaddle her and she sleeps around 6 hours straight but recently she has been learning to get her arms out of the swaddle and as she dreams she twitches and wakes herself up. I'm going crazy because the swaddling was the only thing helping her sleep longer stretches and now that she can get out of it she only sleeps about 2 hours at a time. What can I do? TIA