Is The Contraceptive Pill Causing Lactation?

Hello. I m a 22 years old female. 7 weeks ago I was having protected sex (using a male condom) when the condom slipped and got stuck inside me. It took me 3 hours until I figure out how to get it out and I did. The intercourse was only 3 days after the end of my previous period and when we noticed the condom had slipped we didn t go through with the intercourse and there was no ejaculation. Just to be safe, however, I decided to take the emergency contraceptive pill (Contraplan II: levonorgestrel is the active ingredient). This was my second time ever taking this pill - the first time I took it was 2 months before that. 5 days after taking the pill I experience heavy vaginal bleeding for 4 days. There was protected sex after that incident. My period was 9 days later (counting from the period preceding it, not the bleeding after the pill) but I did get the period after all. 2 days before I got the period, when I started having a pregnancy scare, I took a quantitative blood test and it was negative. It is now 2 weeks since that period. 2 days ago I started experiencing lower abdominal pain (that is normal though in my case because I have IBS). My back sometimes hurts and so do my shoulders. The symptom that got me worried is that my left breast started hurting around the nipple and I noticed very light lactation yesterday. Light in the sense that a) It is not milky, but it is not clear either, and b) the quantity is little, I actually have to squeeze the nipple for the discharge to come out and when it does, it is barely a drop. I went to see a gynecologist today. She ordered a blood test to test the prolactin level. I asked for an ultrasound to check for an ectopic pregnancy. She conducted it and said there was no ectopic pregnancy. She told me that my ovary was very active though. I am yet to do the blood test and the urine test she asked for. I just want to check that this means I definitely do not have an ectopic pregnancy. And if not, what can the reason behind the lactation be? Is it related to the contraceptive pill at all? Thank you.