Leak of antifreeze

About a month a go I fixed my water pump and timing belt because they went out I havn't had a problem until today that I know of antifreeze is coming from the same place? I don't know why or why it would take this long for it to leak again if I didn't put it in right which im sure I did. Also it seems like my engine sound like it will die sometimes after 5 hours of sitting and I turn it on. I tap the gas a little so the idle is high when I turn it off and it seems to help but I really don't want to flood the engine either? And my lights flicker on my car dash and head lights I cant use my raido because im afraid it will go out for good but iv had an electric problem since I got it the engine is a 3.2