Psyching Myself Out??

My husband and I are ttc and I think that I have pregnancy symptoms but a negative pt. I felt little cramps a couple days after ovulation but not menstrual type cramps. They came and went for about 2 days. I had spotting 12dpo, I've been really tired and going to bed earlier and earlier every night. I have been gagging in the morning but not vomiting and headaches. I'm supposed to get my period in 5 days and when I took a pt this morning it was negative. Am I just making myself have these symptoms or am I pregnant? The not knowing sucks!!!