Blood?

Laura • Hi. Me and my fiance are trying for our #1st. Both in our early come mid 20`s. Im a professional Dog groomer/Business owner.
Im 7 week preg, Over 3 week ive had brown spotting light and heavy, some with cramps other not, yesterday i had a big bleed then it went, no cramps however.. last night i had a few cramps and a little bleed, not im back to brown spotting. Whats going on, van anyone help?