Hiya, no you cant have another blood test or it will just show that you are still positive to the helicobacter. Ask for the breath test, its the least invasive and only takes 5 mins. The only other thing you can have is an endoscopy, which is invasive.
I just posted about mine on another thread. I did the first treatment , had an endsocopy because they wanted to see what was going on in there. While under they did what they call a rapid urease test , which tells right away if you still have it. I did ,so went onto treatment two, then I had the urea breath test which proved negative...So it took two treatments to get rid of it for me.
Second time around I was getting really worried, thinking well if this one doesnt work, what happens next time. I did the Losec HP7 day treatment. ( twice ) LOL
anyway good luck, let me know if you still have it or not.
Isobelle