On The 16th Of This Month, I Assumed My Cycle

On the 16th of this month, I assumed my cycle started early. I was not expecting it until the 21st. But since Ive been on, its been coming and going. It started off light pink/red. Then later on the 16th after work, it went light brown to no blood. The next day it did the same but dark red blood started to drip out. Every time I wiped myself, it would be no blood appearing on the tissue. The 3rd day it bled during the day but stopped at night. I noticed some blood clots but was not sure. Now today its just little to none dark brown blood. My cycle normally last a full 7 days. Ive miscarried twice before and I really would like to be pregnant. And the reason I think i may be pregnant is because all the symptoms ive been experiencing. Such as vomiting, cramps when i lay down or sit, big appetite, etc. please help me