Oo, safe naman ang breastfeeding habang buntis, pero it really depends on your body, some moms find it draining kaya feeling tired lang, while iba kaya nila both. I'd suggest talking to your OB about it para sigurado based sa condition mo specifically, lalo na if you're having any cramping or concerns, they can give you better peace of mind na walang risk sa second pregnancy mo. Every mama's different kaya better safe than sorry, diba!