Is something wrong? Heavy Period then positive brand clear blue and easy @home positive??? Unknown dpo due to ‘period’

Sorry if this doesn’t make sense I’m panicking. Me and my partner have been trying to concieve for 3 years. Started letrozole my first cycle on 19th November. Confirmed ovulation, but not pregnant. All tests were stark white. My next period came on the 17th December and was a normal period (so I took my letrozole). It’s was quite heavy and had a few clots in it. Fast forward to now, I would be on CD14 from my last period, I’ve done tests and they are all positive (which would be too early to get a positive if my last period was an actual period). Clear blue digital says 2-3 weeks.

I’m worried now. Could I have had a missed miscarriage?? Early pregnant unit will do HCG levels tomorrow and Thursday but I am going to be a nervous wreck until then. This is a very wanted baby.