3day light period not my norm heavy 7 day period

Autumn

Okay so this month I started my period the day it was due however usually i get pms the week before with terrible cramps. this period i didnt cramp at all mostly just extra gassy. the period its self wasnt as heavy and it started out with a dark brownish and then turned a light red and only took up a half of the pad or less in a full day. I didn't think much of it just figured id have to try again next month except it started jan11 and ended on jan13. the 13 it was almost non existent. usually my period is heavy and super red and lasts six or seven days.

i took two hpt one last night after work and one in the fmu. I hadn't had alot to drink before I took the one from last night anyway both were negative at first but the one from last night has a a positive with the original line saying negative being lighter than the line saying positive and the control line also being darker. the one from fmu has an indent and has blue specks on it.

the same thing happened when i miscarried with the positive appearing over three hours after the test was taken. I dont want to freak out but i am afraid to miscarry again. i have felt so differently this month compared to my regular cycles.

has this happened to anyone else or anyone have advice? please.