Too little details to really help here.
It's very unlikely that you are being directly attacked, at least not this bad. This might sound rude, but as a new person here and clearly new to spiritual warfare, you are likely not important enough to be worth attacking to this level.
This is likely your own mind acting up, which could be a mix of mental health, spiritual dross cleaning up (which does manifest intensely sometimes) or just your mind overreacting to spiritual experiences.
For the first, ground yourself by doing fun, relaxing things, as a break from spirituality every now and then. Void meditation also helps, but it's a habit you likely will have to build for a while to get results.
SaTaNaMa meditation can help balance yourself a lot. Imagine energy entering through the crown on S/T/N/M, exiting through the Third Eye on A. No more than a couple minutes if you're new to it.
Cleansing and protection, obviously, should already be in your routine if you're doing RTRs.
In addition, just calm down. Realize you are not in any danger and that you are likely making things worse by worrying. Calm down, and let thoughts pass.