I’m worried - hcg didn’t double

Hi all. This Saturday I was 4 weeks exactly and I experienced some light moderate cramping and spotting. I went to u/c where they took my blood and told me my hcg was 142. Dr said it was too early to do a scan and to come back in two days (today) and get my blood drawn again. So I did and my hcg went up to 241. It didn’t double, or come close to doubling, and that’s got me worried. :-( I haven’t had any spotting since Saturday, I’ve had some light cramping but sometimes I feel like it could be gas. Sometimes I would feel like the cramping is more on my left side, but I’ve read that left sided cramping is often associated with gastrointestinal issues such as gas or constipation. But anyways, I’m super worried about my hcg levels and am wondering if anyone has similar experiences and what was the outcome? Thank you!