Symptoms coming and going

Due to a recent miscarriage in December my brain has convinced me that with this pregnancy I'm not allowed to have a good day... Good day with mild symptoms = something is terribly wrong... This will be my first baby and I'm just really nervous after losing my angel at 5 weeks (I just hit 8 weeks today). Everything else leads towards everything is perfectly ok last week I had my ultrasound and I was measuring 7wks+1 and heart rate was 146. I wish I knew how to convince my self it's ok. I even took a pregnancy test which turns out to have been affected by the hook effect (tested again after diluting with a one-to-one ratio of plain water and the test was so much darker). So everything that's happened proves at least on paper that things are ok but I just can't seem to believe it... Sorry for the rant, any advice would be appreciated. Sorry the photo is blurry btw I was shaky