Pregnant?

I’m terrified I don’t know what to think and I can’t sleep at all I’m 18 and I recently switched birth control I went from just progesterone to progesterone and estrogen me and my boyfriend had sex right before I took my last progesterone pill I waited the week that you’re supposed to take sugar pills and then I switched I’m usually about a week late so I didn’t think much of it at first and then I started spotting I thought I was just starting because I always spot before I start but I’ve been spotting for about 12 days now and maybe it’s just me being scared but I feel like I am I asked a friend and my boyfriend what they thought they said they think it could just be because the change in my birth control I haven’t been able to take a test because I can’t let my mom know at all can anyone give me any advice/thoughts? I thought I should also add that I’ve been feeling extremely depressed and I’ve been pregnant before sadly I was forced to abort the baby due to my age at the time but when I was pregnant and had no idea I just randomly become incredibly depressed and idk it just scares me that I’m feeling the same way again for seemingly no reason