High Needs Baby and Sleep

highlights

DS2 is 7 weeks old and pretty high needs. He nurses ever 2 to 3 hours and usually isn't soothed by anyone but me. 

I'm okay with this, except for the fact that I am incredibly sleep deprived. So much so that it is exacerbating a pre-existing condition and I no longer feel safe driving, and occasionally even carrying DS (the condition gives me dizzy spells).

 DS1 makes it impossible to "sleep when the baby sleeps," and DS2 has impeccable timing- he wakes up as soon as DS1 is napping or down for the night. DH helps when he can, but he works long hours and I EBF. 

 Any suggestions on getting some sleep?