IF you had unprotected sex in the second week or so of your cycle.. around day 14-16 typically on a 28 day schedule .. and your tube have grown back then yes.. you could be PG.. far enough along to take a HPT.. i would get one and see..
Tubals can grow back especially after several years.. if you google it you'll find lots of information. there is also a HighRisk PG board and a Infertility board you might look at too for people in your situation specifically.
Depending on the surgery type some are more easily grown back then others..
It could also be the start of Menopause.. Blood tests at your doc could tell you for sure if your peri menopausal..
I would start with an HPT.. if its Negative its safe to say your probably not PG.. and i would contact your doc to see about getting some horme testing..
unfortunately the signs of PG are signs of AF and Menopause as well.. (so not fair right?!? lol)