Anyone have a similar story with good results?

My first pregnancy was a miscarriage at 10 weeks. I was devastated. I had a period and immediately (accidentally) fell pregnant again and carried my daughter to term. She is almost two. January this year, we discovered we were pregnant again and miscarried at 8 weeks (February 9th bleeding began, passed baby February 12th, bleeding ended February 15th). I was so discouraged because odds were in my favor after having a healthy pregnancy. Well now I’ve discovered I’m pregnant a 4th time with no period in between. I remember taking an ovulation test, but don’t remember when it was. So from February 15th to now, I’ve conceived with no idea when. Anyone know how to map how far along I am without knowing ovulation date? Also, anyone have a success story of something similar. I’m not even excited because I don’t want to be attached and it happens again. If you knew me, you’d know that’s NOT like me. I just don’t want to be devastated again.