The first thing you need to do is get your PH under control. It needs to be about 5.5, and not fluctuate much. Wrong PH can cause many problems that you do not want to deal with.

Your watering schedule sounds fine.

And yeah, you can veg however long you want. Some people don't veg at all and harvest more often and yield less per harvest. Others grow a tree and get several pounds from each plant. Just depends on what's good for your situation. Normal is about 6-9 weeks.

Also you should be feeding at about 1/4 strength only after the first two weeks. Only a little bit of B1 like SuperThrive before then.