sharp cramps and stomach locking !!

As
8weeks and 3 days. Last night me and my boyfriend were having sexual intercourse and I start to feel this pain in my pelvis, which is the same pain I felt when I found out I was pregnant around 5weeks. I pushed my boyfriend off of me because I started to feel the pain raise from my pelvis to my stomach. The pain was very unbearable,  I tried to stand up to go to the bathroom but I could barely stand up straight because it felt like my stomach was locking and cramping at the same time. After an hour I tried to lay down but any pressure on my stomach made it worst. Today I woke up the pain was gone but still felt a little pressure in my stomach when I would move around. I am at the emergency  room because I feel like something could be wrong and I am so worried. Has anyone ever felt this before ?