I Had A Beta Hcg Of 3 On Monday (day

I had a beta hcg of 3 on Monday (day 25 of my cycle), we have been trying to conceive. On Thursday morning (day 28) I had a positive home pregnancy test in the morning followed by a negative that afternoon. On Friday (day 29) I took 2 positive home pregnancy tests relatively early in the day. Saturday and Sunday evening I had negative tests and Sunday I have begun spotting some brown discharge. Is it safe to say this was a chemical pregnancy?