Hi, I am very confused so any help will do, thank you.

Here is my situation, I had sex on June 8th the day before my period was supposed to arrive on June 9th. I started a cold and my period on time on the 9th. This is the first period that I have had since my laparoscopy for severe endometriosis on the 25th of May, it lasted till the 13th. On the 15th I started to spot it was a dark brown color and it lasted until early the next day. I spotted again on the 19th the same way but only during the day by night it was gone. On the 21st I had sex (minor bleeding afterward) again and on the 24th I started cramping nothing came until the 25th. On the 25th I began spotting once again but this time only when I wiped and it was very light pink, today (26th) the same thing but the cramps are worst and it is a little heavier today than yesturday and pinkish brown. The same cold that I started is still going (which is very unusual) and some days are worst than most I also have very low energy...falling asleep at a moments notice. I have actually had to take stay awake pills just to keep myself up at work and when I do go to sleep after work I sleep until the next day. I am not sure if this is a sign of pregnancy or not and if the spotting if it is implantation spotting or normal. I am not on any birth control at this time and I have a normal 28 day cycle and never spot until the last day of my period usually. Any information please let me know...this is weird and any advice would help. Not trying to concieve right now.