Positive Test, Cramping, & Bleeding on same day.

Kendra
Hoping for help! Ok We have been TTC for about 5 months now. My cycle is very consistent as according to this app, I always get my period 3 days prior to the app's predicted start date. On March 1st, I started spotting. March 3rd (the day my period was supposed to start) I was still only spotting. March 4th I took 2 HPTs and they were both positive. I have had extreme pain in my legs for about 2 weeks prior to taking the tests. Today, March 5th, I took another HPT and it is still positive, but I've been experiencing a little more bleeding and cramps that feel like menstrual cramps also, earlier today I passed some small clots. The bleeding is not enough to soak through a pad at all this whole day. I have had a miscarriage before and this seems all to familiar. Any guidance or advice would be appreciated!