Do I need to worry?

Hey, 

Following in from my post the other week this lump on my neck... me and boyf tried to pop it and a tiny bit of liquid came out and it looked red and angry and now its flared up again to the same as it was before it moves with the skin and is painless my boyfriend said it looks like it's got a white head but I'm not convinced 

I've felt very tired and run down symptoms of cold or flu but it not turning into anything

This is the 4th week now.. should I be worried?