I don’t know what’s happening...

Harlow

My husband and I have been ttc for 6 months now and I’m 37 years old. I’m almost 2 months late and I’ve taken numerous pregnancy tests and they immediately go negative. In January and March I’ve done some travel out of the country and I’ve never had issues being late before from travel. AF is usually on time. Not sure what’s going on with my body but it’s so frustrating! Has anyone else gone through this? Any advice would be greatly appreciated!