he slept!!!! advice please!

So baby boy is 6 weeks on Thursday and the past 2 weeks he's been sleeping only about 2-3 hours at a time at night. Prior to that he was sleeping in 5 hour stretches. Last night we gave him gas drops because my husband thought he was fussy and he slept almost 5 hours. I don't want to get into the habit of giving him those regularly but I also want everyone to come back to life from zombiehood. Any suggestions?