Help! Spotting

I am about 4 wks (found out I was pregnant on 7/12)...well I just started spotting. Just a little brown about the size of a nickel and just a little when I wiped.

I know that they say a lot of women spot, but I had a small hemorage during my first pregnancy and ultimately miscarried, so I have all of that running through my head again.

It's taken us months to get pregnant again, and was so excited because I got strong positive and even on digital 5 days before AF was due. I wasn't having the pain and extremely frequent urination like i had the first go around, so was hoping I was doing better this time. :/