Why is conceiving so complicated 😳.

I’ve been trying for about five months now and it’s very hard not to get discouraged. This month has been way more relaxing then the others. My husband and I just been having fun and going with the flow. I know I ovulated on day 14, I had EWCM. But it didn’t last very long.. today is my day 22 and I’ve been having a lot of pms symptoms... had a dream I was pregnant.. I know it’s still early but I took a upt test anyway and it was negative 😒.