Yes, you could have ovulated and you could be pregnant. Take a test - if its negative and your symptoms continue retest in a week.
You said you are posting again to get more responses, but we really can't give you anything more than telling you to take a test. We can't tell you that you are or aren't pregnant. We can tell you anything is possible and that you do have symptoms, but the only way to know for sure is to test.
Take a test and let us know what happens! A friend of mine had no period in between two of her kids and ended up conceiving anyway, it does happen! Good luck!!