unwanted pregnancy

i feel so alone. my boyfriend and i never have unprotected sex, but i’m not on birth control. he always pulls out. i usually have very heavy periods and extreme cramping, but last month my period was lighter than normal, but i still experienced the same cramping, if not worse. i started to get worried about that period though, thinking maybe it was implantation bleeding, although i bled through a few tampons and pads. so its been about a week and a half since my last period and i’m now supposed to be ovulating. i was checking my cm and when i looked at my finger it was covered in blood, i’m now spotting. i heard that this is normal between periods and during ovulation but i’ve never experienced it, and with my previous period being unusual, i’m starting to worry. i experience cramping on the daily, but it’s been that way for about a year now. haven’t had any morning sickness or anything too alarming, but i’m still so stressed out. i want to cry, i don’t want a child, i never have. i’ve been talking to my step mom about this and she isn’t being very supportive. i just feel so alone.