Tell me it's normal and I'm going to be okay :(

Be
So I got my BFP on Friday 6/17 I haven't been to the doctor yet and right now I'm terrified. I'm 4w and 6d and last night I noticed some brown spotting in my panties. No big deal I put a panty liner on and went to bed. This morning there was a small brown spot on the liner again no big deal cuz a lot of women have spotting in early pregnancy. After I had a bowel movement I started getting scared because what was just a little spotting has become redder and a lot heavier. Not like a period but more blood than I would like to see right now. Also I've been having some pain kind of like very light period cramps for the last two days. Plaese tell me this can be normal. I didn't have any of this with my first pregnancy and I don't know what to do.