I have ethernet but not wifi

after a few days of vacation i came back home only to find my ethernet not working on my computer so i restarted the router and it worked the next day i had tried to use the wifi and it didnt work so i restarted that too until to my suprise it wasnt working and i had to unplug the machine just to find it saying that it is working on the router but not on my phone then i checked my pc and my ethernet (the cable connected to the back of my pc that gives it internet) was perfectly fine! pls help