Pregnancy

Ok ladies I'm 9 weeks post partum today. I've yet to have my period back. I had sex on the 21st of march with a condom for the first time since the birth probably the 31st of march and 1st of april I had a tiny bit of spotting and I mean very very tiny. I thought it was just from me starting my birth control cause they said it's normal to spot a little halfway through the pack the first month. Well april 1st at night I just got randomly very Ill feeling and then it went away within 30 minutes. I decided to take a test april 2nd in the evening even tho I felt stupid for doing it cause I didn't think there was anyway with us using a condom I could be pregnant. Well to me and my husband we believe we might have saw that second line but it was so so so faint. Faint enough it doesnt even show up on camera but we both saw I took another this morning again crazy faint but we both believe we can see a line. I'm trying not to think about it to much just cause neither one of us believe I could be we have no idea when o would have ovulated since I havent had a period since our baby was and the 4th of april would make it 2 weeks exactly since we had sex for the first time. When should I retest I'm kinda going out of my mind here cause we defiantly didnt plan on having another this soon I mean we would be so grateful to add to our family just very nerve racking for it to happen this quickly our baby is only 9 weeks old