Spider mites and powder mildew!!!!

Ok so I'm about a good 3 weeks into flowering and I've got a huge problem! I've got two plants in my grow tent I picked up for a dispensary, one has both spider mites and mildew and the other just mites for the most part. I'm running two 4 in fans in my tent due to lack of room. I just bought some foliage spray to kill the pests and I just spyard a mixture of 2:1 of baking soda and water to help the mildew. My question is, how Fucked am I? My plant with both mites and mildew is starting to change colors, the stems that have buds seem be dying while the ones with bud see. To be hanging in there, but the overall plant looks ugly This is my first real grow and and running Into problem after problem.

Use nuke em. Itll kill both problems. Then when the harvest is done use bleach to clean out the area and use three stages of pyrithium bombs to kill everything. Then get more clones that are clean, or start from seed.