Could these be pregnant cramps or period cramps?

I had 4 times during the week I think i ovulated, and for the past week ive felt moody, abdominal pain, lower back/side pain off and on, headaches, a little pain in ovaries but not as bad as my usually cramps, light headedness throught the day off and on, my areolas seem a little darjer then normal, but could that be because ive spent alot of time in the sun in my bathing suit over the last 3 days?, and for two days I had a little pinkish clear discharge when I wipe. my period isnt due for two more days, and I took a test yesterday, but it was negitive... Did I test too early? Has any one else felt like this and ended up being pregnant? Am I just over reacting because ive been thinking alot about wanting and having a child? anyones thoughts wilk help, thanks in advance