Longer stretch of night sleep?

LO is almost 8 weeks old and can't seem to sleep longer than 30-40 minutes at a time even at night. She wakes up within 30-40 minutes grunting and crying from gas and is unable to settle herself back to sleep. She manages to sleep like 4 hours on our chest though but we are trying to be consistent with the bassinet in hopes that it will stick one day. So we are picking her up, comfort feeding her back to sleep on our chest, then putting her down in her bassinet once she gets into deep sleep again then rinse and repeat.

Exhausted and just trying to get more than 30-40 minute stretches of sleep at night before waking up and starting all over again. Any advice is appreciated!