Secondary infertility?

I’m 32 and my husband is 34. We got pregnant with our first after 3 months of trying. We have been trying for our 2nd for 9 months with no luck. I got an ultrasound and everything looked great. I’m so confused and worried. Should my husband and I keep trying? Is it time to see a fertility doctor? Any advice or encourage would be helpful! ❤️❤️❤️❤️❤️