A tummy tuck should not cause a prolonged period. However, if you were given an antibiotic this may have changed your vaginal flora and triggered a yeast infection. Check with your gynecologist for their recommendation. Best wishes.
The wrinkles and bulges of your scar will smooth and flatten, this is not uncommon to see in some scars initially following surgery. your scar will likely change over the next several months to a year. there are various topical creams/moisturizers, silicone tapes, and massage that...
From the photo it looks like you have a nice result and are healing well. Unless you have been very active, the chances are that you are doing just fine and are experiencing normal postoperative recovery.Good Luck, Talk with you Surgeon.