New here but bfp at 11dpo

Jasper

Hi I’m new to the group but was excited to share that I got my bfp at 11dpo. I used opk test strips and bbt charting to help conceive. I luckily got it on the first try. I do have a five year old already and he is the love of my life and I’m super excited to welcome our next child into our lives. I still have yet to set doc appointment. I am nervous that the line might get lighter I’ve heard a lot about chem pregnancy’s. How common is it ?