First beta numbers at 4 weeks?

Jenny • Late 20's. TTC #1 Recovering from 2nd miscarriage at 6-7 weeks.
What was your 4week beta number?
Just got confirmation of the BFP with a 4 week (15dpo) beta number of 500. This was after our first <a href="https://glowing.com/glow-fertility-program">IUI</a>. 
Really hoping to see it double in two days...fingers crossed. Symptoms disappeared today (sore boobs), so a bit concerned but trying not to over analyze. Had one early mc a year ago at 6 weeks. 
Best, Jen