Help !!!!

June I felt every bit of pregnant all the way into July. My period was due July 7th , however this period was oddly different . Light and only lasted 2 days and spotting into the 3rd day. I'm a normal 28days 3-4 days in length . Light , to medium or heavy [2days], last day light then spotting which is how I no I'm ready to be done . In July 19th I believe I tested and it was negative so I ignored everything . Symptoms were off and on but because of the negative I ignored it . Mind you the last time I had sex was July 1st . My period wasnt due again until August 3rd. Today's the 31st of July and I randomly spotted July 30th around about 12ish in the afternoon . This completely took me for a loop . No stress , no excercises, etc . Here it is the 31st and I'm bleeding slim to none , more so when I use the bathroom or wipe but barely on my pad and even still , with my normal period I have to either use a tampon and a pad or change very often. The 30th was my first having sex since the 1st . On the 30th the spotting was brownish pink and the light flow is really darker than my bright red . So I'm confused . What do yall think