Need advice

I recently found out I am pregnant, this is my first ever pregnancy! And today the doctors said I am 6 weeks pregnant going from my last period. I am so so so so excited and so in love already but my body doesn’t believe it!! I’m overthinking everything. I feel like all my pregnancy symptoms I had have gone and I just keep taking tests cause my body seriously doesn’t believe it. Is this normal?? I’ve also been having some period like cramping which last about 10-15 seconds and comes and goes when they please? Is this normal?