“Pregnant” and I’m going out of my mind

So last week I got my first BFP since my 1st (and hopefully only) miscarriage back in June 2018.

The lines are getting darker. And I got my first round of blood work done today. I’m about 4 weeks and 5-6 days and my HCG level is 137. My next test is Friday and I’m just trying to tell myself all is well... I have been so much better to my body this time and eerily feeling much better than last time and with my first pregnancy (which was 6 years ago). Last time around I was 5 weeks with a level of 24-25.

Any insight or reassurance on hcg levels?