Spotting before my period

Alicia

Okay so on June 15Th I’ll be 5 months PP. So I know my periods are still regulating. I’ve done all kinds of research but for the past 6 days I’ve been spotting on and off sometimes brown sometimes pink. I know I do not have an STD or any infections because I was checked while I was pregnant with no infections not even yeast. I am 110% faithful being married so the only person I’m with is my husband and I know he is faithful to me also, so I’m not worried about any STDs being the cause. My main concern is the fact that I’ve been peeing more than normal and now I’ve been spotting for six days on and off. But I had my tubes tied during my c-section. How high are the chances that I’m pregnant? I keep reading that spotting is the like the number one sign of pregnancy and I’m trying not to worry about it but at the same time I’m like well what if. Could it be stress?? I have gained weight to and I did start smoking again (please no judgement). I’ve read those can be causes. Any insight would be great! Thanks.