HCG levels

MC

I’m 4 weeks today and my HCG levels (drawn yesterday) are at 13. I just feel like that’s so low and my pregnancy tests are so faint. Has anyone had faint tests and low HCG numbers at 4 weeks and gone on to have a healthy pregnancy? I lost my twins at 7.5 weeks, 8 weeks ago. My tests with them were so dark by 11DPO, I just can’t help but feel worried. Any info/reassurance is welcome❤️ Thank you

The bottom pic with blue dye is from 14DPO