Hi welcome to Health care magic forum.
Thanks for calling H.C.M.F.
As you describe you had period on 26th feb, and 22nd march, after the period you had pain in the lower abdomen, backpain, and you got short ness of breath as well.
It appears to be due to
urinary tract infection, you have used
metronidazole, but the infection would not have been cleared completely.
Pregnancy any how you have ruled out by doing pregnancy test.You need not worry about it. The touch feeling and air feeling you need not consider at all, because they don't signify any thing.
I advise you to consult a gynic for diagnosis and treatment.
Wishing for a quick and complete recovery.
Best regards.