For others who run into this situation, I found this to be the most straightforward solution:
conda create -n venv_nameand
conda activate venv_name, where
venv_nameis the name of your virtual environment.
conda install pip. This will install pip to your venv directory.
Find your anaconda directory, and find the actual venv folder. It should be somewhere like
Install new packages by doing
/anaconda/envs/venv_name/bin/pip install package_name.
This should now successfully install packages using that virtual environment's pip!