worried &' impatient

I had a miscarriage back in sep and found out last week we are pregnant with our rainbow baby. Had a doctors appointment on Tuesday and the nurse told me they got my blood work results back and that I had hypothyroid and I told her I found out I was pregnant last week (Feb 27)  and she looked at me all surprised. She said that's so weird you got your blood work done on Feb 13 and the pregnancy one came out negative. She's like you need to be careful because sometimes having hypothyroid can cause miscarriages. Well with that being said I had talked to the dr told her I been spotting brown for the past few days having mild cramps here and there. She put me on bed rest until the spotting stops and they get back my HCG levels. This waiting game is killing me, my spotting comes back every 4-5 hrs and it's usually only when I wipe. But the cramps are starting to come more often. I'm trying soo hard to stay positive but I'm stressing so much like my head is all over the place. I don't want to go through another miscarriage..... so please can you guys keep me &' my rainbow baby in your prayers.