How much bleeding if too much during pregnancy?

Katie • 29 years old
This is my first pregnancy. I had sharp cramps in my lower stomach that lasted just a couple of minutes but had me in tears it hurt so bad. It was 15 minutes after sex. I began lightly blessing yesterday afternoon. It began to get too heavy for a longer and I had to wear a pad. I went through 2 tampons during the night... I'm scared I may have lost this baby.