Positive HPT with low HCG

I'm currently 9dp5dt with IVF ICSI for male infertility. Im 26 and my husbands 28. We were told this should be a breeze because of our ages and nothing being "wrong" with me.  I started getting faint but positive hpt starting 6dp5dt. Yesterday, 8dp, I had my first beta and my result was 5. So my RN said I'm pregnant, but it likely won't be viable. Today I took another test and my hpt has gotten darker. Is there any hope that my beta was just off or is this likely a chemical pregnancy?