Very early preflower... Need help...

Yesterday I detected some spider mites on the leaves and tried to take some measures. I sprayed some water+nicotine solution and when I checked them a few minutes ago I saw some but not in great numbers. I wiped as much leaves as possible by using soft and wet sponges to get rid of the remaining mites. Even though I cannot see any of them for now, I know that they'll come back.

I'm just trying to buy some time to make them more potent buds. If I lose the battle against those creatures, will I also lose the buds? If so, I can think about immediate harvest... I mean, do they harm the buds directly? Can the buds become worse than they are now in a short period of time?

I'm really confused right now...