Bleeding after conception

So about a week ago I used preseed for the first time, during ovulation. It was a little over 2 weeks before my next AF.... I spotted for 2 1/2 days and then began to bleed super heavy with blood clots. Keep in mind I wasn’t due for a period again for 2 weeks!! Blood clots are normal for me during my AF so idk if it was an early period but it was definitely different in color than normal. At first I was thinking the spotting was implantation but now, again, I am thinking it was just an early period. I also read that some people have bled like that (clots and all) during early pregnancy and it was normal for them. any tips? Ideas? HELP!!!