I'm in my 4th pack of Necon 1/35. The only side effect I've been ...

I'm in my 4th pack of Necon 1/35. The only side effect I've been having is spotting during the 3rd week of pills. This same spotting issue has been happeneng since I got on the pill 2 1/2 years ago. First I was on Alesse, then Loestrin 24 fe, and now Necon and they all caused light spotting in the 3rd week of pills. This is very frustrating and inconvenient. Does this happen to anyone else?? I'm thinking about just stopping the pill altogether because of this.