Am I pregnant 😭

Buckle up. I'm hoping someone reads to the end that had a positive experience similar to mine. I have a very short luteal phase (7 to 9 days, typically 8) so when I had my daughter I got a positive AFTER a full period. August 26 I got a positive test at 10 dpo (period was 1 day late) but later that day I got my period for the full 5 days. Still called my doctor and got bloodwork on Wed (hcg 49ish) and Friday (hcg upper 60s) - hcg increased! So I got bloodwork Tuesday after labor day, hcg went down to 43, they thought it was a miscarriage said to get bloodowkr again the following Friday and watch for bleeding. Well, no bleeding and my hcg went back up. Now they think ectopic and since I have gone weekly for scans and they are pretty sure it isn't (but can't rule it out yet since it's early). So my hcg has continued to rise, though slower than it should (which also happened with my daughter- I didn't get to see a heartbeat until 9 or 9.5 weeks). I got a scan last Tuesday and there was a little sac measuring 5 weeks but nothing in it (only around 900 hcg) and now the sac didn't grow as much as they expected so they think it may be another miscarriage. This has gone on for almost a month now and I'm emotionally exhausted and just not sure what to think. So I guess my question is has anyone else gone through anything like this? What happened?