Tips ttc

Does anyone have any tips? I’ve been ttc for about a year now. I have a daughter who is almost 4 with my husband. We’ve been trying to have another for about a year. In January I had 3 positive tests but was exposed to Covid and was quarantined so I couldn’t make a doctors appointment, I ended up testing positive for Covid as well. And about 2 weeks after my positive pregnancy tests, I started bleeding and cramping real bad and it wasn’t like a normal period, it seemed to be more clumpy and a lot of tissue. I went to the hospital and they told me my pregnancy test there was negative which was super disappointing and then they added that they don’t think I was ever pregnant and they were pretty much talking to me like I was stupid 🙄 so I was really heartbroken, but anyways we’ve still been ttc and it’s starting to feel impossible. I just need tips or words of encouragement.