It's so hard not to get down even if it hasn't been that long. I tried for 2 years with ds1 before going down IVF route which worked but then got pregnant naturally within 2 months of coming off the pill with ds2. So looking back I think at times I was being impatient doing IVF as there were no problems identified and I can obviously get pregnant naturally.
My advice is to try to relax and take a few months off from ttc. Just try to dtd every 2-3 days but forget about temping and opk sticks etc. i did all those first time around and nothing worked then when I got pregnant second time I was so shocked as I thought I'd missed the window as I had a vague idea of when I had ovulated but purely based on knowing my body. It's so easy to say and I know how stressed and upset I was every month but I honestly think having a break might be useful.
In terms of going to Dr, I think it's up to you. I went for initial tests after about 8 months but I've always had irregular periods so thought there might be an issue but turns out all seems fine. It's good to rule things out but I also think looking back I was probably impatient and maybe should have tried for longer before going down IVF route.