Experiencing All The Symptoms Of Pregnancy But The Results Were Negative

how to begin, im wondering if i could be pregnant or is it something else? back in february i went to have pap and everything came back negitive but i was inflammed so wants me to have check ups every 6 months instead of a year. the reason i had gone is i had found a lump in my breast well it was cyst. at my visit in february i had weighed 130 and now i weigh 140 and i have weighed 140 before and none of the clothes i wore then fit. i have recently started gaining the weight all of sudden at once it feels like. i was self checking breast and what looked like milk came out of one so i checked other on and its not so much as the other, plus its the other breast that i had found the lump in. they are perkier than usual as well. i have had my period but its been different at the end of march i had my period within week half to two weeks i had thought i was starting again but it was only a very light watery looking that was just a little for about a day an half. this would april 12 didnt start until may 2 and wasnt off til the 11. i have been tired more than usuall, every emotional, and also i didnt camp like i normally do normally its at the beginnng i had no sign of starting. i also been having a stretch feeling on my upper right side and lower part where my normal cramps are for period has ached a different ache not hurting but yet burn feeling ache not sure how to explain it. also i took a pregnantcy test before i started my period but it was negitive. i need advice or help to guide into right direction please, what should i do.