period or miscarriage?

I've had 3 miscarriages with my husband and each time it is fairly early and passes by almost unnoticed. (I also have an auto immune disease that calls for regular doctors appointments including pregnancy tests and the detection of leftover pregnancy hormones caught 2 of them) so I feel like I should be somewhat used to the specific feelings of a miscarriage. This month I was 28 days late which is not unheard of for my weird body. But today when I "started" it was excruciatingly painful and involved a lot of clotting and something that I would say is akin to mucus? I called my mom who has had similar issues with health in her life and she probed for questions about my symptoms over the past month, many of which I now realize align with pregnancy symptoms (sore breasts, weight gain, fatigue, etc) and we are both now concerned I may be miscarrying again. My husband thinks I'm being dramatic. Any ladies had similar issues? I'm a little concerned due to my pain levels today.