yes, run it.. .5mg at least twice a week
it is necessary, 100mg of testosterone per week is the average TRT dosage and will keep you damn near the very top of the t range - estrogen levels will increase even at this dosage for most people, at 300mg you WILL have an increase in estrogen beyond optimal levels
whether it manifests itself as bloat, gyno, mood swings, or ED you will most likely notice something going on
if your nips are sore now, you should jump on the dex asap