So nervous to have another chemical

So I had a miscarriage and D&C at 6 weeks in October. Had a chemical pregnancy in November, basically got a faint positive test and then proceeded to get my period followed by negative tests.

Then this morning, I got another faint positive. And started spotting tonight. I’m so scared it’s another chemical. I know it could just be implantation bleeding and be totally fine, but my first pregnancy that ended in the miscarriage had a lot of spotting the whole time, so spotting really really freaks me out.

Just really want a pregnancy that sticks!!! This whole process has been horrible and frustrating. Why can’t I just be one of those women who finds out they’re pregnant and then carries the baby to term?