Does anyone have these symptoms, should I see a doctor

I have been having these symptoms for sometime now, let me know if anyone had similar ones.

1. Delayed periods( only sometimes, once every 2 to 3 months my periods is delayed for 2-3 weeks)

2. Painful sex - sex is really painful for the last few months. I thought it will get better, but it's not.

3. Weight gain- I have gained atleast 15 pounds in 3 months, but my food diet is really good.. exercise not so much.

4. Acne flare up.

I know all of this is hormonal troubles, but since my periods is only delayed couple of times a year and only by a few weeks, I think it's fine. Did anyone have these symptoms with more or less regular periods.