Thoughts and Advice please!

Hi everyone! I’m going to get right down to it! Last period was dec 27-31, my husband and i are ttc! I have been having very little brown spotting for the past 4 days. Usually my periods are very heavy. Some light cramping. Yesterday i was going pee i swear every 20 minutes. Took a test today and got a negative result. I’ve had no other symptoms. Maybe it’s still too early to test? Your thoughts and advice would be greatly appreciated!!