Paranoid of miscarriage

I’m so paranoid of a miscarriage I’m tempted to go to my doctor and beg her for an ultrasound. I’m only 6 weeks (not due for first ultrasound until 9 weeks). I got pregnant so fast this time around that I feel like it’s too good to be true. I’m also having some pains that come and go in my lower abdomen. I wouldn’t say they’re cramps, more like gas or constipation I think. But every time I feel a twinge I worry, I’m afraid I’ll see blood any time I go to the restroom, I’m scared to have sex even though I know it won’t affect my baby. I don’t remember feeling this anxious with my first, but we had also been TTC for 1.5 years so I was more relieved than anything just to know we could get pregnant. Anyone else just as worried as I am, or am I going crazy? 😕