Spotting

Julie
Hi all, I am around 7weeks pregnant with #2. I have been having minor pink spotting mainly after sex, however yesterday I was spotting with no sex, literally just a tiny spot then this morning I had some more heavier spotting still relatively light but more than yesterday and now it has turned to brown discharge. Im not having any major cramps or anything, just the normal cramps I tend to get and still as sick as I have been the last few weeks. Anyone know possibly what could be, going to see dr tomorrow and pray nothing sinister.