Laparoscopy & Missed Period

Ni
So I had my very first laparoscopy on May 31st of this year and had my period the week before my surgery. I had a little bleeding from the surgery for a few days after. Then the bleeding completely stopped. I had sex two weeks after my surgery with my husband 3 different days. Now it's been 6 weeks since my last period. My period normally would have started 7 days ago.. I have been feeling sick the last few days and my cm has increased quite a bit. I haven't been sleeping well and keep having dreams I'm pregnant.. What do you all think? Could I be pregnant this soon after my surgery? I took 2 tests and they were both negative. They were taken 3 and 4 days after my period would have normally started. What do you all think it could be? Have any of you experienced this?