impatient and confused

left a question a couple of weeks ago similiar but am still confused. i had unprotected sex when i was ovulating and had spotting about a week before my period was due mid march. still no period, my first blood test came back neg but couldnt rule our early pregnancy and the 2nd inconclusive. when i was preg last time the hpts took 12 weeks to read positive so i dont bother with them. i had mild cramping just after my period was due, nausea when i smell things like caramel sundees strange as that is 😉 and turps. ive been mildly constipated sorry if tmi sore breasts and have noticed in the last week that my nipples are bigger and my areola darker. i went to see my dr about a week ago but she was away and the dr on duty didnt send me to get another blood test she sent me to get a gyno ultrasound to check for cysts but nothing, i asked the guy who scanned whether he could tell and he sed that he couldnt nesecarily tell but he was looking at my overies. i dont want to go back until my doctor is back from holiday on the 21st but im so impatient and really want to know. ive now missed 2 periods. has anyone had a similiar experience ??