Is it just in my mind

My husband and I have been TTC for a little over a year now, I have an odd cycle with an average of a 45day length. On the 7th we had sex, it was the day after AF ended. Since then I've noticed that my breast have been very sore/swollen, I've also had random nausea attacks, I can't seem to hold my pee, I now need to nap at least twice a day and I've been feeling little flutters (almost like muscle spasms) in my uterus. Could we be pregnant ???