How to Install pip for python 3.7 on Ubuntu 18?

I've installed Python 3.7 on my Ubuntu 18.04 machine. Following this instructions in case it's relevant:

Download : Python 3.7 from Python Website [1] ,on Desktop and manuallyunzip it, on Desktop Installation : Open Terminal (ctrl +shift+T)

Go to the Extracted folder$ cd ~/Desktop/Python-3.7.0$ ./configure$ make$ sudo make install

Making Python 3.7 default Python :

$ sudo vim ~/.bashrcpress ion the last and new line - Typealias python= python3.7press Esctype - to save and exit vim:wqnow type$ source ~/.bashrc

From here: https://www.quora.com/How-can-I-upgrade-Python-3-6-to-3-7-in-Ubuntu-18-04

I've downloaded several modules through pip install module but when I try to import them, I get a ModuleNotFoundError: No module names 'xx'

So I did some research and apparently when used pip to install, it installed in the modules in previous version of Python.Somewhere (probably a question in SO) I found a suggestion to install the module using python3.7 -m pip install module but then I get /usr/local/bin/python3.7: no module named pip.

Now I'm stuck, pip is installed, but apparently not for Python 3.7. I'm assuming that if I can install pip for Python 3.7, I can run the pip install command and get the modules I need.If that is the case, how can I install pip for python 3.7, since it's already installed?

This is the best I have come up with:

I have installed python 3.7 successfully and I can install modules using pip (or pip3) but those modules are installed in Python 3.6 (Comes with ubuntu). Therefore I can't import those modules in python 3.7 (get a module not found)

Python 3.7 doesn't recognize pip/pip3, so I can't install through pip/pip3I need python 3.7