After TTC for 5 years got a BFP but still cant believe it?

TODAY I'M HAVING MY ULTRASOUND AND THE BLOOD TEST NEXT WEEK BUT I STILL CAN'T BELIEVE IT AFTER 5 YRS OF TTC I GOT A BFP 2 ON THE 12TH AND 2 ON THE 13TH SO THATS 4 BFP MY LAST PERIO WAS ON OCT 28TH BUT I'M REALLY IRREGULAR SO I'M JUST LOST I DON'T FEEL PREGNANT AND I REALLY WANT A BABY CAN SOMEONE GIVE ME ANY ADVISE