8 DAY PAST OVULATION

In January I lost a baby at 8-9 weeks. We had been trying since August of 2017 and I had just had a miscarriage that was from an unknown about pregnancy. However, since we’ve started actually trying in August I’ve tracked EVERYTHING. Today I was at work, (work for USPS) and I noticed my back hurting. I logged and thought it was just my work issues. Got home and sat and my left breastfeeding started hurting. My SO asked if I had logged. I said not much she I go on to do so. Constipation, nausea, sore breast, freezing cold, cramping, and my SO will vouch for this gassiness, lol. It popped up for implantation cramps and I told my SO. LOOKED BACK, and sure enough I had similar symptoms with the last baby. Has anyone else done this? Could it be just coincidence? Am I over thinking? Blunt answers ladies, please.