Trying for 13 months

So I’ve been trying for 13 months and I always get spotting on and off starting at 6/7 dpo until my period every month. I was worried this is a problem but my doctor says it shouldn’t be. All of my testing is normal except my TSH was 2.94 which is a bit high. I started a strict diet and starting taking medicine for my thyroid two days ago. This month I didn’t get any spotting until today which is 10dpo and it was only a tiny bit. I just want to be happy with the improvement but I was starting to get my hopes up so I’m just really upset that the spotting came now. I’m afraid I’m never going to be a mom and I always believed that was my purpose in life. I feel worthless and broken. This is the worst thing I’ve ever went through. I took femara this month and I guess it didn’t work... trying an <a href="https://glowing.com/glow-fertility-program">IUI</a> next month but I just feel like mentally it’s going to be so hard.