Implantation cramps???

Hey guys I just started this app today but my guess of ovulation this month was right and we definitely BD multiple times during ovulation and now I’m getting cramps and pressure in my vagina and I keep getting nauseas, at night only, but I don’t get sick and feel better in the morning. I constantly feel like there’s acid sitting in my throat when I am nauseas and I’m super tired and super hungry. I tested negative two days ago and AF doesn’t come for another 11 days WHAT DO YOU GUYS THINK. I feel like every symptom I’m preggo, but the last 3 months I haven’t been.... HALP