I had asked for some further information and have not heard back. While I cannot provide as complete an answer without this information, I can make some comments, and explain how the additional information may be helpful.
First, the most common cause of short duration of blood in the urine is a UTI. While there are many other possible causes, it is always appropriate to first consider whether there is evidence of a UTI. And when there is recurrent symptoms, it would be appropriate to consider reasons why the infection may not have cleared up, such as a resistant germ. A urine culture and sensitivity will typically confirm a UTI and detect any rsistant bacteria.
It is unclear what type of food poisoning may have been present, and this is where the additional information that was requested would help the most. Many types of food poisoning do not require specific treatment because most cases will resolve spontaneously. However, treatment may be required if symptoms are more severe or persistent, or in certain types of food poisoning regardless of severity of symptoms. I can say that if you were not started on any additional treatment, the Macrobid would not have helped, as the antibiotic does not achieve levels to be effective until it is concentrated into the urine.
While an ovarian cyst would not cause blood in the urine, even if ruptured, with your history, there is one other consideration that may be causing the cyst and blood in the urine. It is possible that the endometriosis can recur despite the surgery. While a hysterectomy will usually stop the endometriosis, there are some women that can have recurrent endometriosis after a hysterectomy, and the risk of recurrence is greater in women in whom the varies are preserved. Endometrial implants on the ovaries can appear cystic. Endometrial implants can also occur on the urinary system, most often on the bladder.. Most endometrial implants on teh bladder are superficial, but a small percentage can be deeper, and the deeper endometrial implants that can cause blood in the urine. While blood in the urine related to a deep endometrial implant on the bladder is not common, when it does occur, the bleeding can be episodic, just as menstrual bleeding was episodic before the hysterectomy.
So, the first issue would be consideration of whether there is a recurrent UTI, and that is something that can usually be managed by a primary care physician. The additional information that I requested would help clarify the extent of concern about food poisoning and what next steps would be appropriate. If no other cause for the symptoms can be identified, it would be appropriate to see an OBGyn for consideration of whether there is any recurrent endometriosis despite the hysterectomy.
If I can provide any additional information, please let me know.