I was on Lo Loestrin Fe for 10 months, and had to stop for 6 weeks because I had surgery and was required to take blood thinners. I got back on my birth control, and ended up not having a period at all. Usually I have light bleeding for 2 days on my pills, and I'm concerned I could be pregnant. My partner and I used condoms while I was off the pill, but I know accidents happen. So I want to know whether I just missed a period due to my pills, or whether I should buy a pregnancy test just in case.