Hi and welcome to Share.
I am sorry to hear about your miscarriage, and congrats on expecting another baby!
I am not sure about the bleeding, have you scheduled an appointment with your OB? In general, OBs don't see you until about 8 or 12 weeks, but you can explain to the nurse that you had a miscarriage last year and you want to check your blood levels to make sure that your hormone levels are increasing as they should for a pregnant woman.
They may or may not go along with this, I know that with my second pregnancy, my initial blood test was positive, but then the hormone numbers never increased. Sorry, I don't know the actual hormone name! So then 6 weeks later when my home pregnancy test was positive, the nurse understood my worries and let me come in for three blood tests to check that the numbers were doubling.