Did your symptoms lessen? I'm freaking out!

I am 5 weeks and 4 days today. Was pregnant once before I'm 2014, which ended with a miscarriage at 8 weeks, and we had been trying ever since. We finally got our BFP after our 3rd IUI!

So... naturally, I am so scared of miscarrying again. Last time, we didn't know we miscarried until 11 weeks. We had an ultrasound at 7, and all looked good. Had one at 11, and the baby was only measuring 8 weeks and there was no heartbeat. So, since there were no signs last time I am panicking even more. I had a dream last night that we went to the doctor for our first ultrasound, and there was no heartbeat. No I can't shake the feeling and fear. Did anyone else's symptoms lessen after a couple of weeks? I was having mild cramping, and that has gotten much better, and my boobs were hurting a ton, and now are still sore, but not nearly as bad... I am feeling more thirsty than I was l, but otherwise I don't feel pregnant at all. Am I panicking for nothing? Anyone else going through this?