Does this sound like an ovarian cysts?

For the past three weeks I’ve been having some extreme lower belly bloating. I literally look pregnant cause I’m skinny. It’s been so painful none of my pants fit. Only lose sweat pants are comfortable. I’ve gained maybe 3 or 4 pounds in past month but it’s strange that it would only go to stomach. Haven’t changed diet much either. Yesterday my pelvis was so bloated I had to change my pants three times. Today I’m having some sharp pain by right ovary area. Could this be a cyst or just weight gain?