!Over thinking ! Leaving the ER. Pregnancy test still positive

So I have two due dates they’re not sure which one. They’re going by the last time my period and one of the days that I was spotting. The difference is there’s a four week two days versus I think eight weeks and something days. You know how if we have more than one kid some of us parents do that over over extra thinking because of our past experiences. AnywaysLong story short I went to the emergency room because I started cramping and burning from my lower abdomen to the my middle thighs and they did a 2 1/2 ultrasound hours and the doctor said they cannot say no sack yet that I have to return in 48 hours to retest and to check my hCG levels as of right now they are 1269. I’ve never really experienced All this extra all my other pregnancies were normal. Has anyone else went through something like this or similar did everything turn out be fine how did you go on about your not worrying for the next 48 hours what did you do to occupy your mind I got to go on and on with my questions. Feel free to share your story