I took my last bactrim (sulfamethoxazole and trimethoprim) ds at 7 am. Can I have a couple of beer's tonight or no?

Alcohol and meds. If you are done with your medication you should be ok to have an alcoholic beverage. However it is always a good idea to run this by your physician or pharmacist because there may be underlying circumstances that only they would know about!
No problem. Alcohol in moderation doesn't interfere with most antibiotics and doesn't have any effect on infections. You dould have had "a couple of beers" any time during your course of treatment, and certainly can do so now. Of course heavy alcohol can interfere with the immune system's ability to fight infections, so don't overdo it.

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It was almost a full day late but does bleeding during period time after plan b (took in last of bc due to being on bactrim (sulfamethoxazole and trimethoprim) ds 1mo. Ago) mean no preg.

Maybe not pregnant. Plan B can alter the menstrual bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex, because Plan B works most of the time, but not all the time. Read more...