So confused :(

Lu
Last night i took a £1 hpt which was a faint positive so i took another this morning to see if it showed any clearer looks like an even fainter positive but counted it as a neg as think im seeing things. Anyway just brought a clearblue digital and says 'not pregnant' dont do what to do or believe .. :( im over a week late for my period as well as feeling unusually very tired all time, nausea, peeing more than usual, moodswings, light cramps and backache, dizzyness and just genual feeling pregnant