Is 3 weeks 6 days pregnant too early to feel ectopic pain?

Since 9/10dpo (the day I found out I'm pregnant) I have been having pretty intense left sided ovary pain. It feels like stabbing and is in my lower back on the left side too. I've had hip and leg pain on that side for the last couple of weeks so I'm wondering if it's somehow related? I've had no bleeding at all or shoulder pain just this extremely uncomfortable irritating stabbing/burining/aching pain😩 My sister is a doctor and thinks it's too early to feel an ectopic and that it's probably a cyst but this is my 4th pregnancy and I've never experienced this pain. Any thoughts on this ladies? I don't want to spend the money going to the ER of it isn't necessary and I know they won't be able to see anything on ultrasound yet either. Hoping for some opinions😊