HELP! Any Advice Helps.

Hi, I'm 30 yrs old, soon to be 31 in a week😁. My husband is 32 yrs of age. We have been married for 3 years, together for 9 years. We have a 5 yr old girl that was conceived naturally. I was on BC for 4 years after she was born. We have been TTC for 18 months now. My physician ran blood work and came back that my progesterone was low and I wasnt ovulating. So he prescribed me clomid 50 mg for CD 5-9. Jan 15 was day CD 9 on Clomid. I'm now on CD 16 and have yet to receive a positive OPK. Should I be worried? GLOW says I should ovulate on CD 17 but I hesitate to trust it. Haha. My husband and I have not yet BD, since I haven't had a positive OPK yet. Please help. This is all new to me/us. Any tips, advise or stories would calm my nerves and help.

Thanks.