Bedtime problems

Emma

We have à 6 week old baby who doesn't really want to be swaddled, carried, rocked or breastfed to sleep at bed time (rest of time it's okish). She eventually drifts off "on her own" after we try for 2 hours to help. So she manages to self soothe in a sense but seems very agitated when she does and in the process. My first baby breastfed to sleep no problem until late so this is new to me. What would you do ? Any advice?