I would appreciate an answer to these questions if at all possible. Again, thank you for your help. My assumption is that your ovulation was delayed in this cycle and that accounts for the shift in time when a pregnancy test becomes positive. The assumption behind all of the literature-cited times is a 28 days cycle with ovulation on day 14. If you ovulate on day 21, everything shifts forward in time by one week.
Night sweats are a symptom with many causes.
Hormone flux, most commonly a rise and fall in estrogen, is the widely discussed example. Thyroid hormone increase, as occurs during pregnancy, is a second possibility. Illness, such as a cold, can give night-time fever and hence sweating. Medical conditions that cause night-time sweating are uncommon, and since this symptom has appeared with pregnancy, they are low on the thought list. Thank you for your complimentary words about this forum.