Hey jay,
Get your ph up to 6.0.-6.5. A ph of 5.5 is too low for soil. Judging by the container/plant size I wouldn't recommend feeding for a week or two. You haven't fertilized yet have you?
The white bugs were in the soil or on the leaves? It could be whiteflies, says captain obvious me...
If you can afford 25 bucks to kill the bugs get some azamax and do a soil drench. Even if it's not gnats it will still kill any pests you might have, I believe it's certified organic and food safe.
Roots Organic has had fungus gnat infestations in the past which led me to convert to happy frog soil. If you disturb the soil and get a bunch of little assholes flying around then you have gnats. One thing I stress for new growers is to relax and let the plant do its thing. As with most new hobbies it is natural to overthink and over correct.
I hope this helps.