Could i be pregnant.

Hi glow community. My DH and I have been TTC for a few months. At 1am on monday morning May 24th we had sex, and an hour later i had a positive ovulation test. Now its friday and I'm obsessing a little. on Monday and Tuesday i was unusually tired and had gurgling and cramps. Sore lower back. Friday(today) I've been urinating more frequently. My breasts are tender but not painful. I have this constant tingling in my abdomen and thought i felt nauseated. I haven't had any noticeable discharge just damp underwear today and like white dust, small amounts. Anyway, its my first baby if i am. I turned 40 2 weeks ago. I normally have regular periods. Was just wondering if anyone had any thoughts. Trying not to get my hopes up. Thank you.x