Left-sided pain 5 weeks

So I just found out that I’m pregnant, which was very much unexpected. My husband and I had tried off and on for the past 2 years with no luck so neither of us could believe it when I came up with 4 positive pregnancy tests. We had given up on it all together. But now I’m experiencing pretty constant left-side pain (almost feels like a burning pain) and it’s radiating to my back. I’m trying to stay positive but I’m truly afraid it could be an ectopic. Anyone else experience this and it turned out to be just a cyst or something??

I’m calling my doctor this morning to see about getting an ultrasound. We both want this baby so badly and I don’t want anything bad to happen😢 Prayers are very much appreciated! 🙏🏻