I think I'm pregnant

Okay so hubby and I had a very long break from sex... due to work and living arrangements... well we finally got time to be together again. Friday was the first time and I think my bc failed. I'm super in tuned to my body and have noticed quite a few things. I'm super nauseated and queasy often. Mostly in the evenings but late at night or early mornings as well. Cramps and mild headaches. I noticed some spotting that wasn't on track with what I'm used to. This spotting was Tuesday night Wednesday morning. I don't typically spot and it was so light it was almost unnoticeable.