I had all the dull aches too!
I think at your stage it's possible it could be baby implanting and your uterus stretching, this is what I was told when I asked the doc about it. It seemingly died down around week 6!
I know what you mean about the scans though, sometimes it's better to just ride it out and then have a scan when you know the pregnancy has progressed enough to see enough info on the screen of a viable pregnancy, hb, yolk sac etc.
I had the same worries as you honestly but I went about it the wrong way, booking scans every week to see how I was progressing. I also did the clear blue digital tests, maybe test in the middle of next week and see what it comes up as? Make sure it's a morning one too so it's not diluted. :)
I know it's so hard to remain positive but you haven't had any signs of a miscarriage yet with bleeds etc. Missed miscarriages do psychologically mess you up I agree! I convince myself everyday my babies heart could have possibly stopped just because I'd been thinking about my 9 week scan last year when I found that my little ones heart had just gave up.
Take everyday as it comes, I don't know if it makes you feel better but you know rather than being at a hospital setting. I felt so much better in a private clinic, wasn't as busy and just made me so much more relaxed going in.
I would express your concerns to a doctor so he could get a referral in place for you when you feel you're ready. I did this around week 5 and they booked me in for 7 weeks where they knew they'd be able to see what was going off for sure.
Lots of positive thoughts and baby dust your way
Xxx