Hcg level rised slowly then dropped a bit today

Hi I want to tell you about what I have been going through and I hope you share with me any thoughts you may have on this. So after more than 20 days of having a period like bleeding which was around my period time, I went to a gyno and had ultrasound check but she couldn’t see anything in my uterus. She then asked for hcg bloodwork work, I went and did it and the results were 159,71 on the 15th of January, after 48h I went and had another and the level was 206,10 then I went to the doctor and she sent me to another gyno who told me that I needed surgery asap. I was scared and in tears and right before I went back to him to get operated one of my friends recommended going to another gyno and I went eventually. The latter said that the surgery is not urgent and asked me for bloodwork again so I did it and that was 8 days after my last hcg test. The results were 300, so I went back to him and he showed me a cyst of 6mm looking thing and some old blood around it and he asked me to get another bloodwork which I did today and the results dropped to 291. What could this be?? Anyone has any thoughts on this?? I am really scared about this situation.