Possible miscarriage?

Okay so I’m scared I may have had a miscarriage but I’m not entirely sure, I started getting very bad cramps and what seemed like ovary pain along with nausea, a little spotting, bad nipple pain and shakiness one night like 3 weeks ago, it all finally stopped at one point but then I started bleeding heavily along with awful cramps May 2nd, it stopped May 7th, I’m on the mini pill and don’t get a period but I also took two pregnancy tests, one on April 18th and one April 28th both negative. Basically I’m just asking if it’s possible I could’ve had a miscarriage without a positive test? I wasn’t sure what group to post this in

Edit: my mom said if it was a miscarriage the clots I had would’ve been much bigger (she has had a miscarriage) but she was at the end of her second trimester when she miscarried and mine would’ve been very early so if the symptoms and everything match up it’s definitely possible