Ejactulation hours later

I have a question regarding an issue that i couldn't find the answer for anywhere else so I decided to ask here. After masturbating (I know it is bad and I am trying to stop), I usually force the semen to not release, however after several minutes or sometimes even an hour, I see a liquid that is thin and slightly white and slightly sticky, which fits the description of madhiy. Is this considered semen or madhiy and do I have to do ghusl?