U r having just a common cold. If u are ok with not taking medicines then the best is to take steam twice or thrice in the day preferably with some salt. Adding vicks vaporub can be helpful if u r having a lot of block. But be careful as it may irritate the eyes and can sometimes decreases smell sensation if used for long time. Avoid having cold and sour foods.. Soups will help

You seem to be suffering from acute rhinitis which is a common type of viral nose infection. You may need to take simple anti cold medicines and decongestant nasal drops for few days for faster recovery