yeah if its aphids your in the early stage, once you see little black clusters starting to form under the leaves its a heavy infestation(big black bugs with the little white ones inbetween and sticky sap all over where there at) The good thing is they wont do too much damage since your just about done, I just dealt with this about 6 months back and the plants they were on were fine,its the next generations that were fucked, could of saved a lot of trouble if someone told me this instead of trying to save my mothers...
step 1 scorched earth:after your harvest get rid of everything you have(clones, mothers all strains veg and flower, & soil if kept close to grow) step 2:bleached earth, clean and disenfect everything, pots, grow rooms, tools, equipment(inside hoods too) step 3: light a cheap raid bug bomb off in that bitch, wait at least a week then you can go back at it with some fresh cuttings.

peace