Invalid tests...

Cindy

I'm new at this, and not really sure if I'm even posting in the right place. (Apologies if I'm not!) My husband and I lost our 3rd baby on January 12 of 2016. We've been TTC ever since, with no luck. I usually start my period between the 15th and 20th of every month, but today is the 23rd and I still haven't started. I took a test about a week ago, and it was invalid. Nothing at all showed up on it. So I waited a couple days and took another one. It was negative. But, I still haven't started, and, I know some people might think this sounds crazy, but I just feel like I'm pregnant.

My husband is bringing a test home from work, but does anyone have any advice about the best tests to use or if I should wait a little longer? TIA for any advice