How soon did you start experiencing pregnancy symptoms

I’m 5 DPO and my nipples are extremely sore and experiencing light cramping on my left side. My next period starts on the 17th and I feel it’s too soon for incoming period alerts. I haven’t had sore nipples in MONTHS of receiving my period and I feel it’s a bit weird for them to start now that I am trying. They originally started 3DPO and built up in intensity in the last two days. I was also feeling mini cramps 3DPO. I’m coming down with a cold but I’m not sure if it’s pregnancy related because the weather have been changing so much.