Spotting

I had my regular period the 16th of June and had intercourse the 3rd & 6th. I spotted (very light, bright red, and dark brown) On the 8th, 9th, 11th, 12th, & 14th of July. My period was due July 16th. My periods usually are on time. I've been off the nexplanon for over a year. I have been stressed. I think its to early to take a home test. What should i do???