Why I I feel off

I can’t seem to understand why I feel sick but no flu or fever what so ever. I have strong cramps like shooting type of cramps and I feel nausea. To vomited at 1am in the morning then again around 3am. It was everything I ate. I recently had a miscarriage in the early stage of pregnancy on May 26 I believe and was fully done bleeding by the 29. My husband and I had intercourse on June 2, 10th, 11th and 12th. Could I actually be pregnant again? I took a test it said negative would it be safe to say I should test again. And maybe use a better pregnancy test brand? I used a cheap one earlier? So what should I do? My husband really wants a baby.