Bleeding on Gonal-F

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So I took my last birth control pill on the 27th and started my gonal f on the 31st. (So that’s 2 doses from Saturday and yesterday) Today I woke up and had a little bit of blood and now I’m bleeding full on. I wouldn’t say that it’s as heavy as a period because I’m a really heavy bleeder normally but it’s enough that I have to wear a pad. I had told the nurse on the 30th that I didn’t start a cycle after I finished the birth control she said it was normal to have a small amount of “breakthrough bleeding” but I wouldn’t get a period per se.. they’re closed today for the holiday but there is an emergency after hours number but I really don’t want to call if I don’t have to. Anyone experience this? When I googled it one site said to not stop the drugs and take them like they told you that by the 3rd dose of gonal f it’ll go away.. another said if you have bleeding it could be a serious symptom of OHSS so now I’m just freaking myself out