I feel like I’m losing this baby!

I saw the heartbeat on 11/10 at 7 weeks but now I feel like I’m losing my pregnancy symptoms especially in the morning, my bladder would be super full to the point of feeling uncomfortable. Now, I’m able to tolerate it without waking up to pee. I also peed on a hcg cheapie strip and it’s not as dark as it was when I first tested. I went crazy testing 3 times in one day and it’s the same, not as dark as it was when I first tested. I don’t know what to do? My next ultrasound is 4 weeks from now. I’m not bleeding or cramping but I just feel like I might be having a silent missed miscarriage again. I’m also too early for a doppler.