HCG level help? Really worried!

Whitney

So I went to an actual doctor (not OB) 3 days ago to confirm I was pregnant because I had very very very light brown spots that worried me. I had 3 positive pee tests, one was a dollar tree test and it was faint but there. Then a equate early test that also had a faint line, and lastly a digital test that said pregnant. When I went to the doctor they made me draw blood and another pee test. They said the pee test was negative and my blood was at 30 for it’s level. That didn’t make any since to me. So the following day I took another dollar pregnancy test and I still had a positive. The faint line was just a tad bit darker. I scheduled an appointment with an OBGYN and he wanted to do another pee test and blood draw. The pee test was positive but still not dark and I’m currently waiting for the blood results. When I first got the positive test results I estimated about 14-15 DPO. At this moment I’m about 18 DPO. What has me worried is that I had a low level HCG but it still showed up on all my pee tests? Maybe I’m just worried too much. But has anyone experienced something like this and had a perfectly fine pregnancy? Or just some words or encouragement or advice? Much appreciated in my time of need!