should i be worried

stopped bc 2 months ago to ttc My period came back but ever since it came back it does this werid thing i dont remember b4 bc I will start spotting/light bleeding a few days before period is due and i will think its my period then i it seems like it starts then spots then spots idk whats going on can this be part of my body still adjusting off the pill or should i worry also sad im just pregnant