As you're still in veg, you still have all the possibilities available. Use spinosad spray or neem oil, there's usually advise on the packaging. Both can be used either as spray on the plant or given additionally in watering. It's better to stop using them once you're in flower though, as you don't necessarily want to smoke that off your buds. When spraying the plant make sure to also get the undersides of the leaves. Keep also a lot of sticky traps around. If you reach flower and still have the problem, add in some natural predators like orius laevigatus (bedbug! so be careful to keep them IN the tent) and they should do their thing. Best of luck!