Can you take a pic of the root area for your plant.

It really seems like you might be cramped for space. In addition to that you have a pest problem. I used a no pest strip when I had some bug problems. Left it in the room for 1-2 days and then took it out. Worked like a charm and I haven't had bugs since.

It should be worth mentioning that this is a chemical pesticide and harmful to humans. However 1-2 days of use will kill all your bugs (in my experience) and the the pesticides will be gone.

If you're in flower though I would suggest pyrethin or neem oil or something. Wouldn't want to risk a chemical pesticide during flowering where you might actually ingest some after harvest time.

Get some more pics. You definitely have multiple symptoms going on that indicate either PH issue or root space issue, this is in addition to bug problems it looks like you have.