Helpppp!

I got a positive 1/4 had spotting 1/11-1/13 no clots levels were only a 7. Stayed a 7 til er visit on 16th where they along with my ob deemed it chemical. figured I lost it. Still had faints but had a n

egative on digital. Never witnessed levels go down to below 5. I scheduled a new appointment with a new ob b/c I’ve had 3 previous losses. 2 ectopic and 1 blighted ovum. Had to have methotrexate with both ectopic and a d&c with blighted ovum. Sooo I Used 1/11-1/13 as period date to see expected ovulation. But kept my pregnancy dates in other apps Based off app my ovulation should have been on 1/24

with a conception date of the 25th. Started tracking ovulation the week of the 24th had all dark positives for a week. Decided to test and got a BFP on multiple different test even a digital. Line is getting darker. Completely confused on if it’s the same pregnancy possible vanishing twin. Or a new pregnancy. So based off all tracking and apps I’m either almost 8 weeks or I’m almost 4 weeks 🤦🏼‍♀️