Calculating due date..

Okay so I would like some help trying to pinpoint where exactly I am as far as my due date. I’ve tried using the calculators but they go off of LMP and for me that was November 5th.. I know for a fact I am not 7 weeks pregnant. I believe I ovulated and conceived around November 30th as that was the last time we BD’d before December 14th...I got my BFP on December 20th lol.

If I go off of November 30th for conception, I am getting 5 weeks with a due date of August 23rd, give or take a few days in case I conceived a couple days off of when I think. Does that sound right??

I don’t feel 5 weeks pregnant aside from mildly sensitive nipples off and on. I was cramping all last week very intermittently too and not painful. All I have is positive HPTs and confirmed blood work. My HCG on December 22nd was 46 and progesterone at 8.9. Yesterday my HCG was 403 and progesterone at 10.1.