Losing hope 🙁

Madison

My fiance and I did a home insemination (with a syringe) on the 13th and twice on the 14th. I ovulated on the 15th. So I thought the timing was perfect. I am 8 days post ovulation and got a negative on my pregnancy test. I'm expected to start my period on the 29th. Is it just to early to tell? When would be the right time to test again? Any advice is greatly appreciated!