Confused and have questions

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My last period was june 27th, I had light pink spotting july 9th off and on all day which has never happened to me before.. from then till my period was due on july 23rd i had mild cramping in lower stomach and back.. My confusion is i've kept up with my periods for a straight year now and my period has been every 26 days, not before and not after..once again my period was due july 23rd and i did not start until july 27th.. took a test and got a neg.. wish i knew what is going on and if im prego, so if you could give me your opinion, maybe my mind could be put to ease.. things i've noticed out of the ordinary, 4 days late, one day i was very dizzy, following day slept all day all night not normal for me, constant mild cramps all month that come and go, somewhat nausia, persistant left leg pain, lots of breakouts, theres more but am i tricking myself? Help me please with your answers