Suggest Treatment For Tingling Sensation In The Breast With Nausea And Anxiety

Hi. I m really confused. My partner and I are trying to conceive. I have very regular periods. 28th or 29th of every month for 7 days. I ALWAYS get a warning the day before and/or the day of when it starts. It s always heavy for the first 3 days and I would be in a lot of pain. Around the 26th I was having VERY light pink spotting only when I wiped, after a couple of days it turned into light brown discharge again only when I wiped. About 5 days later I now see nothing. (I am also 7 days late of my period). I have had some weird cravings lately and I ve been more tired than normally. My back has been hurting the past 3 days and about 4 days ago my breasts randomly started tingling only for a few minutes, then again the next day. Nothing since. I feel nausea here and there but nothing that would ruin my day. don t feel pregnant. Not sure if I would this early though. I took 7 pregnancy tests bUT all negative. I ve been going through some things lately, stress you can say. My question is, could I still be pregnant or is it more likely from stress.