Are colds common symptoms?

I work with children so I figure this cold is related to them. I'm 11 dpo. Took a test yesterday, got a bfn :( . My breasts are not sore (which is abnormal), but I have cramps (af due in 2 days). Last week I had backaches, head aches and nausea. This week, insomnia, watery cm and moody as hell but I think I'm over analyzing. I wish I would just know! Should I test again or count myself out?