Hello, who had this?

Hello, who had this? Delay already 12 days. With husband on ovulation day we had unprotected sex (we plan for a baby). I didn't think that something could work out on the first try. Literally a couple of days delay it started to feel sick, rocking in the car. Made a test, there was very pale second stripe. Went to KDL, took blood for hCG, pregnancy showed negative. Let go of the situation, waited for menstruation. But they don't come. Made another test, the stripe became clearer, went to a clinic for an ultrasound. Again, nothing showed. Nausea is just terrible in the morning, no discharge, breast hurts terribly. There are no